This green phototrophic bacterium is short, rod-shaped, approximately 0.5x1.0-1.5 μm in size, with rounded ends. The organism is nonmotile, gram negative, and nonsporeforming. Chlorobium ferrooxidans is strictly anaerobic. Originally isolated from shallow freshwater ditches, this bacterium has only been isolated as a coculture with a strain identified as a member of the ε-subclass of the proteobacteria closely related to Geospirillum arsenophilum. When grown in coculture, Chlorobium ferrooxidans oxidizes ferrous iron to ferric iron with stoichiometric formation of cell mass from carbon dioxide. This bacterium is important due to the fact that it is a novel green phototroph, related to other species of Chlorobium yet unique in regards to the oxidation of ferrous iron to ferric iron. This process by bacteria is a relatively novel phenomenon that has only been observed with phototrophic purple sulfur or non-sulfur bacteria (Wkddel et al., 1993; Ehrenreich and Widdel, 1994; Heising and ...

The Yellowstone National Park Research Coordination Network is a collaboration of scientists and NPS staff to develop a coordinated research network focused on geothermal biology and geochemistry.

The Yellowstone National Park Research Coordination Network is a collaboration of scientists and NPS staff to develop a coordinated research network focused on geothermal biology and geochemistry.

Photophosphorylation in vivo by Chlorobium limicola was inhibited by lipophilic cations and the energy-transfer inhibitors diphenylphosphorylazide, Dio-9, 4-chloro-7-nitrobenzofurazan and chlorhexidene. Membrane-bound ATPase activity was also inhibited by these energy-transfer inhibitors. The formation of a membrane potential was stimulated approximately 1.7-fold on illumination, rising to a value between −110 and −150 mV. The sensitivity of the processes producing this membrane potential to uncouplers, energy-transfer inhibitors and 2-heptyl-4-hydroxyquinoline-N-oxide was measured in the light and the dark.

A Chlorosome is a photosynthetic antenna complex found in green sulfur bacteria (GSB) and some green filamentous anoxygenic phototrophs (FAP) (Chloroflexaceae, Oscillochloridaceae). They differ from other antenna complexes by their large size and lack of protein matrix supporting the photosynthetic pigments. Green sulfur bacteria are a group of organisms that generally live in extremely low-light environments, such as at depths of 100 metres in the Black Sea. The ability to capture light energy and rapidly deliver it to where it needs to go is essential to these bacteria, some of which see only a few photons of light per chlorophyll per day. To achieve this, the bacteria contain chlorosome structures, which contain up to 250,000 chlorophyll molecules. Chlorosomes are ellipsoidal bodies, in GSB their length varies from 100 to 200 nm, width of 50-100 nm and height of 15 - 30 nm, in FAP the chlorosomes are somewhat smaller. Chlorosome shape can vary between species, with some species containing ...

Ras of complex proteins (Roc) is a Ras-like GTP binding domain that always occurs in tandem with the C-terminal of Roc (COR) domain, and is found in bacteria, plants and animals. Recently, it has been shown that Roco proteins belong to the family of G-proteins activated by nucleotide-dependent dimerization (GADs). We investigated the RocCOR tandem from the bacteria Chlorobium tepidum with site-directed spin labeling and pulse EPR distance measurements to follow conformational changes during the Roco G-protein cycle. Our results confirm that the COR domains are a stable dimerization device serving as a scaffold for the Roc domains, that in contrast are structurally heterogeneous and dynamic entities. Contrary to other GAD proteins, we observed only minor structural alterations upon binding and hydrolysis of GTP, indicating significant mechanistic variations within this protein class. Mutations in the most prominent member of the Roco family of proteins, leucine-rich repeat kinase 2 (LRRK2), are ...

1)Washington University in St. Louis. Taco Shell Protein: Orientation Of Antenna Protein In Photosynthetic Bacteria Described. ScienceDaily 9 April 2009. 12 April 2009 ,http://www.sciencedaily.com¬ /releases/2009/04/090402171438.htm,. ( 2)D.A. Bryant & N.-U. Frigaard (November 2006). Prokaryotic photosynthesis and phototrophy illuminated. Trends Microbiol. 14 (11): 488. doi:10.1016/j.tim.2006.09.001 (3)Beatty, J.T.; Overmann, J.; Lince, M.T.; Mansket, A.K.; Lang, A.S.; Blankenship, R.E.; Van Dover, C.L.; Martinson, T.A.; Plumley, F.G. An obligately photosynthetic bacterial anaerobe from a deep-sea hydrothermal vent. PNAS June 28, 2005 vol. 102 no. 26 9306-9310 (4)Li YF, Zhou W, Blankenship RE, Allen JP (1997) Crystal structure of the bacteriochlorophyll a protein from Chlorobium tepidum. J Mol Biol 271:456-471. (5)Olson, J. M. (1978). Bacteriochlorophyll a-proteins from green bacteria. In The Photosynthetic Bacteria (Clayton, R. K. & Sistrom, W. R., eds), pp. 161± 178, Plenum Press, ...

Graphical view by InterProScan indicates a graphical display of the arrangment of the predicted domains by InterProScan.. show/hide icon is a toggle switch to show or hide the graphical display.. PNG icon indicates the link of the PNG file of the graphical display. Table view by InterProScan indicates the summary table of the InterProScan prediction. Each InterPro ID indicates the link to the InterPro entry. [S] links to the list of genes which predicted the InterPro ID (Chlorobium species-wise prediction). [D] links to the list of genes which predicted the InterPro ID (cyanobase dataset-wise prediction). GO terms indicate the link to the GO entry. show/hide icon is a toggle switchto show or hide the table.. TableView icon indicates the link of the table page.. GFF3 icon indicates the link of the GFF file of the InterProScan prediction. Transmembrane regions predicted by SOSUI indicates the SOSUI predicted regions. Go SOSUI bottun link to the SOSUI prediction. ...

Ubiquinone (UQ), also called coenzyme Q, and plastoquinone (PQ) are electron carriers in oxidative phosphorylation and photosynthesis, respectively. The quinoid nucleus of ubiquinone is derived from the shikimate pathway; 4-hydroxybenzoate is directly formed from chorismate in bacteria, while it can be formed from either chorismate or tyrosine in yeast. The following biosynthesis of terpenoid moiety involves reactions of prenylation, decarboxylation, and three hydroxylations alternating with three methylations. The order of these reactions are somewhat different between bacteria and yeast. Phylloquinone (vitamin K1), menaquinone (vitamin K2), and tocopherol (vitamin E) are fat-soluble vitamins. Phylloquinone is a compound present in all photosynthetic plants serving as a cofactor for photosystem I-mediated electron transport. Menaquinone is an obligatory component of the electron-transfer pathway in bacteria ...

SWISS-MODEL Repository entry for A1BGZ4 (SYDND_CHLPD), Aspartate--tRNA(Asp/Asn) ligase. Chlorobium phaeobacteroides (strain DSM 266)

SWISS-MODEL Repository entry for A1BED6 (AROE_CHLPD), Shikimate dehydrogenase (NADP(+)). Chlorobium phaeobacteroides (strain DSM 266)

Deyaert, E., A. Kortholt, and W. Versées, The LRR-Roc-COR module of the Chlorobium tepidum Roco protein: crystallization and X-ray crystallographic analysis., Acta Crystallogr F Struct Biol Commun, vol. 73, issue Pt 9, pp. 520-524, 2017 Sep 01. ...

Mouse polyclonal antibody raised against a full-length human PSCD3 protein. PSCD3 (NP_004218.1, 1 a.a. ~ 399 a.a) full-length human protein. (H00009265-B01) - Products - Abnova

General Information: Pelodictyon luteolum (also called Chlorobium luteolum) is a phototropic green sulfur bacteria that inhabits hydrogen sulfide containing water and freshwater mud, brackish waters and marine environments. ...

Catalyzes the phosphorylation of D-fructose 6-phosphate to fructose 1,6-bisphosphate by ATP, the first committing step of glycolysis.

Nuclease that resolves Holliday junction intermediates in genetic recombination. Cleaves the cruciform structure in supercoiled DNA by nicking to strands with the same polarity at sites symmetrically opposed at the junction in the homologous arms and leaves a 5-terminal phosphate and a 3-terminal hydroxyl group.

The structure, composed of a monolayer of glycolipids with embedded proteins, that encloses the pigments and other contents of the chlorosome. [PMID:14507718, PMID:14729689, PMID:17303128]

The products offered within this site are intended to support common nutritional deficiencies that may occur from chemotherapy or radiation therapy and are not individually tailored to your needs. The products offered on this site have been developed by Dr. Dylan Foster, DC, PScD, CFMP, ONC of Post Chemo Nutrition. Advanced Nutrition and Wellness, LLC dba Post Chemo Nutrition, does not guarantee or assert any improved bodily function as a result of purchasing or consuming any product offered on this site. Under no circumstances will Advanced Nutrition and Wellness, LLC and/or its members be responsible for any loss, adverse reactions, effects, consequences, damage, affliction or illness resulting in your reliance on the content provided or consumption of products sold on this site. Advanced Nutrition and Wellness, LLC and/or its members disclaim any and all liability for products or services recommended and/or sold on the site or loss in conjunction with any content provided. The information ...

TY - JOUR. T1 - Iron-sulfur centers in the photosynthetic reaction center complex from Chlorobium vibrioforme. Differences from and similarities to the iron-sulfur centers in Photosystem I. AU - Kjær, Bodil. AU - Jung, Yean Sung. AU - Yu, Lian. AU - Golbeck, John H.. AU - Scheller, Henrik Vibe. PY - 1994/7/1. Y1 - 1994/7/1. N2 - The photosynthetic reaction center complex from the green sulfur bacterium Chlorobium vibrioforme has been isolated under anaerobic conditions. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis reveals polypeptides with apparent molecular masses of 80, 40, 30, 18, 15, and 9 kDa. The 80- and 18-kDa polypeptides are identified as the reaction center polypeptide and the secondary donor cytochrome c551 encoded by the pscA and pscC genes, respectively. N-terminal amino acid sequences identify the 40-kDa polypeptide as the bacteriochlorophyll a-protein of the baseplate (the Fenna-Matthews-Olson protein) and the 30-kDa polypeptide as the putative 2[4Fe-4S] protein ...

The green sulfur bacteria are a family of obligately anaerobic photoautotrophic bacteria. Most closely related to the distant Bacteroidetes, they are accordingly assigned their own phylum.[1] Green sulfur bacteria are nonmotile (except Chloroherpeton thalassium, which may glide)[1] and occur in spheres, rods, and spirals.[citation needed] Photosynthesis is achieved using a Type 2[citation needed] Reaction Centre using bacteriochlorophyll (BChl) a and in chlorosomes which employ BChl c, d, or e; in addition chlorophyll a is also present,.[1] They use sulfide ions, hydrogen or ferrous iron as an electron donor and the process is mediated by the type I reaction centre and Fenna-Matthews-Olson complex. Elemental sulfur deposited outside the cell may be further oxidized. By contrast, the photosynthesis in plants uses water as the electron donor and produces oxygen.[1] Chlorobium tepidum has emerged as a model organism for the group; although only 10 genomes have been sequenced, these are quite ...

BrunchClust produces 7 clusters: two complete for ATP-A and ATP-B and one incomplete for ATP-F. ATP-A and ATP-B clusters contain paralogs that are also reported as a result of clustering. There are two paralogs on the ATP-A branch one is of Rhodopirellula baltica and the second is of Methanosarcina acetivorans, and there are three paralogs on the ATP-B branch: two are from the same species as those on the ATP-A branch, i.e. Rhodopirellula baltica and Methanosarcina acetivoran, and the third is from Chlorobium tepidum. List of 30 taxa: 16 Bacteria: Aquifex aeolicus, Bacillus subtilis, Chlorobium tepidum, Corynebacterium glutamicum, Deinococcus radiodurans, Geobacillus kaustophilus, Geobacter sulfurreducens, Gloeobacter violaceus, Nostoc sp., Pseudomonas aeruginosa, Rhodopirellula baltica, Rhodopseudomonas palustris, Streptococcus thermophilus, Streptomyces coelicolor, Thermotoga maritime, Thermus thermophilus, and 14 Archaea: Aeropyrum pernix,Archaeoglobus fulgidus,Haloarcula marismortui, ...

ID B3EM59_CHLPB Unreviewed; 996 AA. AC B3EM59; DT 22-JUL-2008, integrated into UniProtKB/TrEMBL. DT 22-JUL-2008, sequence version 1. DT 20-DEC-2017, entry version 67. DE SubName: Full=FAD-dependent pyridine nucleotide-disulphide oxidoreductase {ECO:0000313,EMBL:ACE03437.1}; GN OrderedLocusNames=Cphamn1_0473 {ECO:0000313,EMBL:ACE03437.1}; OS Chlorobium phaeobacteroides (strain BS1). OC Bacteria; Chlorobi; Chlorobia; Chlorobiales; Chlorobiaceae; OC Chlorobium/Pelodictyon group; Chlorobium. OX NCBI_TaxID=331678 {ECO:0000313,EMBL:ACE03437.1, ECO:0000313,Proteomes:UP000001228}; RN [1] {ECO:0000313,EMBL:ACE03437.1, ECO:0000313,Proteomes:UP000001228} RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. RC STRAIN=BS1 {ECO:0000313,EMBL:ACE03437.1, RC ECO:0000313,Proteomes:UP000001228}; RG US DOE Joint Genome Institute; RA Lucas S., Copeland A., Lapidus A., Glavina del Rio T., Dalin E., RA Tice H., Bruce D., Goodwin L., Pitluck S., Schmutz J., Larimer F., RA Land M., Hauser L., Kyrpides N., Ovchinnikova G., ...

Green photosynthetic bacteria adjust the structure and functionality of the chlorosome - the light absorbing antenna complex - in response to environmental stress factors. The chlorosome is a natural self-assembled aggregate of bacteriochlorophyll (BChl) molecules. In this study we report the regulation of the biogenesis of the Chlorobaculum tepidum chlorosome by carbon assimilation in conjunction with temperature changes. Our studies indicate that the carbon source and thermal stress culture of Cba. tepidum grows slower and incorporates less BChl c in the chlorosome. Compared with the chlorosome from other cultural conditions we investigated, the chlorosome from the carbon source and thermal stress culture displays: (a) smaller cross-sectional radius and overall size; (b) simplified BChl c homologues with smaller side chains; (c) blue-shifted Qy absorption maxima and (d) a sigmoid-shaped circular dichroism (CD) spectra. Using a theoretical model we analyze how the observed spectral ...

Transmission electron micrograph of a thin section of Chlorobaculum tepidum strain TLST. The black bar represents 100 nm. The electron transparent ovoid-shaped structures appressed to the inner surface of the cytoplasmic membrane are chlorosomes. courtesy Dr. Donald Bryant ...

This domain of about 175 to 200 amino acids is found, in from one to five copies, in over 50 proteins in Fibrobacter succinogenes S85, an obligate anaerobe of the rumen. Many members of this family have an apparent lipoprotein signal sequence. Conserved cysteine residues, suggestive of disulfide bond formation, are also consistent with an extracytoplasmic location for this domain. This domain can also be found in small numbers of proteins in Chlorobium tepidum and Bacteroides thetaiotaomicron ...

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In contrast, the main lipid contributors to organics preserved in modern halites and bittern beds are the extremely halophilic archaea and their organic signatures are enriched in the isoprenoids, especially phytane (Table; Barbé et al., 1990; Wang, 1998). Likewise, Waples et al. (1974) and ten Haven et al. (1986), noted that Tertiary sediments deposited in many saline evaporitic lagoons retain high concentrations of regular C25 isoprenoids. They related it to the activities of the photolithotrophic Chlorobiaceae sp., an anaerobic green sulphur bacteria, known to flourish at the halocline of modern saline lakes. It is thought to have flourished in similar stratified settings in ancient mesohaline to hypersaline seaways. Its biochemistry leads to the preservation of a series of 1-alkyl-2,3,6-trimethyl benzenes, thought to be derived from the breakdown of its aromatic carotenoids in sulphate- and sulphide-rich brines (Summons and Powell, 1987). Ten Haven et al. (1988) went on to propose that ...

Predicted to localize to cytoplasm and cytoskeleton. Is expressed in several structures, including brain; immune system; neural ectoderm; sensory organ; and somite. Orthologous to human SLAIN1 (SLAIN motif family member 1 ...

Xing, E. P., & Karp R. M. (2004). MotifPrototyper: A Bayesian Profile Model for Motif Families. Proceedings of the National Academy of Sciences of the United States of America. 101(29), 10523-10528. ...

Carbon metabolism is the most basic aspect of life. This map presents an overall view of central carbon metabolism, where the number of carbons is shown for each compound denoted by a circle, excluding a cofactor (CoA, CoM, THF, or THMPT) that is replaced by an asterisk. The map contains carbon utilization pathways of glycolysis (map00010), pentose phosphate pathway (map00030), and citrate cycle (map00020), and six known carbon fixation pathways (map00710 and map00720) as well as some pathways of methane metabolism (map00680). The six carbon fixation pathways are: (1) reductive pentose phosphate cycle (Calvin cycle) in plants and cyanobacteria that perform oxygenic photosynthesis, (2) reductive citrate cycle in photosynthetic green sulfur bacteria and some chemolithoautotrophs, (3) 3-hydroxypropionate bi-cycle in photosynthetic green nonsulfur bacteria, two variants of 4-hydroxybutyrate pathways in Crenarchaeota called (4) hydroxypropionate-hydroxybutyrate cycle and (5) ...

Carbon metabolism is the most basic aspect of life. This map presents an overall view of central carbon metabolism, where the number of carbons is shown for each compound denoted by a circle, excluding a cofactor (CoA, CoM, THF, or THMPT) that is replaced by an asterisk. The map contains carbon utilization pathways of glycolysis (map00010), pentose phosphate pathway (map00030), and citrate cycle (map00020), and six known carbon fixation pathways (map00710 and map00720) as well as some pathways of methane metabolism (map00680). The six carbon fixation pathways are: (1) reductive pentose phosphate cycle (Calvin cycle) in plants and cyanobacteria that perform oxygenic photosynthesis, (2) reductive citrate cycle in photosynthetic green sulfur bacteria and some chemolithoautotrophs, (3) 3-hydroxypropionate bi-cycle in photosynthetic green nonsulfur bacteria, two variants of 4-hydroxybutyrate pathways in Crenarchaeota called (4) hydroxypropionate-hydroxybutyrate cycle and (5) ...

Discover Lifes page about the biology, natural history, ecology, identification and distribution of Colias nastes - Artic Green Sulfur -- Discover Life mobile

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Fossilized organic molecules of green sulfur bacteria are helping to u...The fossils were found in sedimentary rock commonly used to make ho...The findings are reported in the May issue of the journal Geology (...Kenig and his colleagues have spent almost 15 years trying to le... It should have been one or the other said Kenig. You cant have...,Seabed,secrets,in,English,clay,biological,biology news articles,biology news today,latest biology news,current biology news,biology newsletters

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Abstract The interaction between the purple sulfur bacterium Thiocapsa roseopersicina and the green sulfur bacterium Prosthecochloris aestuarii was studied in a gradient chamber under a 16-hours light-8-hours dark regime. The effects of interaction were inferred by comparing the final outcome of a mixed culture experiment with those of the respective axenic cultures using the same inoculation densities and experimental conditions. Densities of bacteria were deduced from radiance microprofiles, and the chemical microenvironment was investigated with O2, H2S, and pH microelectrodes. P. aestuarii always formed a biofilm below the maximal oxygen penetration depth and its metabolism was strictly phototrophic. In contrast, T. roseopersicina formed a bilayer in both the mixed and the axenic culture. The top layer formed by the latter organism was exposed to oxygen, and chemotrophic sulfide oxidation took place during the dark periods, while the bottom layer grew phototrophically during the light ...

Microtubules (MTs) are filamentous structures found throughout the cytoplasm of eukaryotic cells. They are polymers of tubulin that are involved in maintaining the structural integrity and plasticity of cells as well as the internal structures of cilia and flagella. Microtubules are also essential in several key cellular processes such as cell division and intracellular transport.. Proteins that accumulate at the ends of growing microtubules, known as MT plus end-tracking proteins, play an important role in regulating the dynamics and organization of the organelle. The SLAIN2 gene encodes one such MT plus end-tracking protein. This protein is targeted to microtubule tips by interacting with End-Binding proteins through its C-terminal domain. It is involved in cytoplasmic microtubule organization and nucleation. Through its N-terminal domain, it binds with the polymerase ch-TOG, recruiting it to the microtubule plus ends and thus ensuring microtubule elongation. ...

Niebla limicola is a fruticose lichen that grows on barren mud flats and on sand among salt scrub along the Pacific Coast of the Vizcaíno Desert, of Baja California from San Vicente Canyon to Scammons Lagoon (Guerrero Negro). The epithet, limicola is in reference to the thallus growing on barren (alkali) soil. Niebla limicola is distinguished by a hemispherical thallus lying loose on soil without a central holdfast (terricolous), divided into variously shaped branches, partly narrow in length and prismatic in cross section, and partly flattened and dilated from which short acicular bifurcating branchlets arise, the thallus up to 10 cm high and 15 cm across. The species (N. limicola) also recognized by containing salazinic acid (without triterpenes), and by a relatively thin cortex, (0-)45-75 µm thick, appearing to erode on dilated parts of branches; the thinner cortex evidently related to the contorted appearance of the branches in addition to the medulla being partly hollow (fistulose). The ...

TY - JOUR. T1 - Two dimensional electronic spectroscopy of molecular complexes. AU - Cho, Minhaeng. AU - Brixner, Tobias. AU - Stiopkin, Igor. AU - Vaswani, Harsha. AU - Fleming, Graham R.. PY - 2006/2. Y1 - 2006/2. N2 - Two dimensional (2D) heterodyne-detected electronic photon echo spectroscopy is introduced and described. We give an intuitive description of the origin and information content of 2D electronic spectra, focusing on molecular complexes. We identify two important quantities-the transition dipole term, and the transition frequency cross correlation function that controls the appearance of 2D electronic spectra. We also show how the transition frequency cross correlation function controls the rate of exciton relaxation. These concepts are illustrated with experimental data on the seven bacteriochlorophyll FMO complex of a green sulfur bacterium, showing how the pathways and mechanisms of energy flow can be elucidated by combining 2D spectra with theoretical modeling.. AB - Two ...

Natural photosynthetic pigments bacteriochlorophyllsc, d and e in green bacteria undergo self-assembly to create an organized antenna system known as the chlorosome, which collects photons and funnels the resulting excitation energy toward the reaction centers. Mimicry of chlorosome function is a central pro

Chappaz-Gillot, Cyril; Marek, Peter L.; Blaive, Bruno J.; Canard, Gabriel; Bürck, Jochen; Garab, Győző; Hahn, Horst; Jávorfi, Tamás; Kelemen, Loránd; Krupke, Ralph; Mössinger, Dennis; Ormos, Pál; Reddy, Chilla Malla; Roussel, Christian; Steinbach, Gábor; Szabó, Milán; Ulrich, Anne S.; Vanthuyne, Nicolas; Vijayaraghavan, Aravind; Zupcanova, Anita; ... mehrBalaban, Teodor Silviu ...

Expression of CYTH3 (ARNO3, cytohesin-3, GRP1, PSCD3) in spleen tissue. Antibody staining with HPA013979 in immunohistochemistry.

Brief Course Overview:. This course will cover the history and future of mediation, the psychology of conflict, negotiation skills and cross-culture.. The course also covers the various practical stages of the mediation process and with the supervision of a trainer, each delegate is guided on how to successfully navigate these stages to the standard required for the accreditation.. The participants will carry out commercial mediation role-plays.. Date: 4 - 7 October 2021. Time: 10:00am to 18:00pm daily. Price: CHF 1500.-/ CHF 1650.- (in 3 instalments of CHF 550.-). Price for SCCM Members: CHF 1275.-/CHF 1400.- (in 3 instalments of CHF 500.-, CHF 500.- and CHF 400.-). Training Language: English. Location: Online, via Zoom. ...

Acanthodii (8) Acanthomorpha (17) Acanthomorphata (9) Acariformes (9) Acaromorpha (17) Acoela (2) Actinobacteria (1) Actinopteri (17) Actinopterygii (15) Aculeata (25) Adephaga (8) Aequorlitornithes (2) Aetogate (2) Agaonidae (1) Agoniatitina (1) Aleocharinae (1) Alismatanae (4) Allotriocarida (5) Alveolata (14) Amaurobioidea (1) Ammonoidea (3) Amoebozoa (9) Amorphea (14) Amphipoda (1) Anabantiformes (1) Angiospermae (35) Anguilliformes (1) Angusteradulata (2) Animalia (102) Annelida (12) Anomalogonatae (16) Anthophila (5) Antliophora (14) Anura (1) Anystides (1) Anystina (1) Apiales (1) Apiformes (1) Apo-Tracheophyta (3) Apocrita (28) Apoditrysia (1) Apoidea (11) Apoikozoa (6) Apotracheophyta (7) Arachnida (87) Araneae (18) Araneida (1) Araneomorphae (17) Archaea (3) Archaeobranchia (1) Archaeognatha (1) Archosauria (10) Archosauromorpha (9) Archostemata (2) Arthropoda (59) Artiopoda (1) Ascomycota (13) Asgard (10) Asioryctitheria (39) Asparagales (7) Assamioidea (1) Asteiidae (1) Asteraceae ...

Fleming has compared 2-D electronic spectroscopy to the technique used in the early super-heterodyne radios, where an incoming high frequency radio signal was converted by an oscillator to a lower frequency for more controllable amplification and better reception. In the case of 2-D electronic spectroscopy, scientists can track the transfer of energy between molecules that are coupled (connected) through their electronic and vibrational states in any photoactive system, macromolecular assembly or nanostructure.. Fleming and his group first described 2-D electronic spectroscopy in a 2005 Nature paper, when they used the technique to observe electronic couplings in the Fenna-Matthews-Olson (FMO) photosynthetic light-harvesting protein, a molecular complex in green sulphur bacteria. Said Engel, The 2005 paper was the first biological application of this technique, now we have used 2-D electronic spectroscopy to discover a new phenomenon in photosynthetic systems. While the possibility that ...

Some present may remember an entertaining (not to mention illuminating (pun intended) ) blog by Professor Larry Moran:. http://sandwalk.blogspot.ca/2016/04/fun-and-games-with-otangelo-grasso.html. I am a high school Biology teacher and Professor Moran threw out some challenges which cut me to the quick.. Here is a very brief and incomplete summary:. The dual photosystems of Blue-Green Algae clearly evolved late from a combination of a type I reaction center in species like Heliobacter and green sulfur bacteria and a type II reaction center from species like purple bacteria and green filamentous bacteria. The oxygen evolving complex was a late addition.. Both photosystems employ Porphyrins and Carotenoids which are important in various metabolic processes (not just photosynthesis) meaning their evolutionary history may reflect many other functions only to be co-opted later for photosynthesis. Meanwhile both can be demonstrated to have abiogenic origins.. Meanwhile RuBisCO is found in ...

Photic zone euxinia (PZE) has proven important for elucidating biogeochemical changes that occur during oceanic anoxic events, including mass extinction and conditions associated with unique fossil preservation. Organic geochemical analyses of a 380 Ma invertebrate fossil, which included well-preserved soft tissues, from the Gogo Formation (Canning Basin, Western Australia) showed biomarkers and stable isotopic values characteristic of PZE and a consortium of sulfate-reducing bacteria, which lead to exceptional fossil and biomarker preservation. The carbonate concretion contained phytoplankton, green sulfur bacteria (Chlorobi), and sulfate-reducing bacteria biomarkers with an increasing concentration toward the nucleus where the fossil is preserved. The spatial distribution of cholestane unequivocally associated with the fossilized tissue and its high relative abundance to the total steranes suggest that the fossil is a crustacean. The presence of an active sulfur cycle in this Devonian system, ...

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TY - JOUR. T1 - Anisotropic organization and microscopic manipulation of self-assembling synthetic porphyrin microrods that mimic chlorosomes. T2 - Bacterial light-harvesting systems. AU - Chappaz-Gillot, Cyril. AU - Marek, Peter L.. AU - Blaive, Bruno J.. AU - Canard, Gabriel. AU - Bürck, Jochen. AU - Garab, G.. AU - Hahn, Horst. AU - Jávorfi, Tamás. AU - Kelemen, L.. AU - Krupke, Ralph. AU - Mössinger, Dennis. AU - Ormos, P.. AU - Reddy, Chilla Malla. AU - Roussel, Christian. AU - Steinbach, Gábor. AU - Szabó, Milán. AU - Ulrich, Anne S.. AU - Vanthuyne, Nicolas. AU - Vijayaraghavan, Aravind. AU - Zupcanova, Anita. AU - Balaban, Teodor Silviu. PY - 2012/1/18. Y1 - 2012/1/18. N2 - Being able to control in time and space the positioning, orientation, movement, and sense of rotation of nano- to microscale objects is currently an active research area in nanoscience, having diverse nanotechnological applications. In this paper, we demonstrate unprecedented control and maneuvering of ...

The protein is actually located in chlorosome. Transfer energy was calculated with hetero-atoms. This is solid state NMR model ...

Absorption spectra of BChl a-associated proteins from various C. tepidum strains recovered by Ni2+-affinity purification.Absorption spectra (traces 1-6) of BChl

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