• Although this near-wtGFP was fluorescent, it had several drawbacks, including dual peaked excitation spectra, pH sensitivity, chloride sensitivity, poor fluorescence quantum yield, poor photostability and poor folding at 37 °C (99 °F). The first reported crystal structure of a GFP was that of the S65T mutant by the Remington group in Science in 1996. (wikipedia.org)
  • Phi-Yellow proteins have excitation/emission maxima at 525 and 537 nm, respectively. (evrogen.com)
  • The emission wavelength of these proteins is ideally positioned between those of green and red fluorescent proteins, allowing easy separation of these fluorescent tags by flow cytometry using common channels of detection and a single laser excitation line. (evrogen.com)
  • They can have enough distance between their excitation and emission wavelengths to convert red to green light. (eresearchco.com)
  • Here, two fluorescent proteins with overlapping excitation or emission spectra have to be used. (microscopemaster.com)
  • Fluorescent pigments absorb light in the same way chromopigments do, but the absorption of light at a particular wavelength may cause excitation of these pigments, causing them to fluoresce. (reefbuilders.com)
  • Current, antibody-based diagnostical methods utilize antibodies against histamine raised by conjugating histamine to a large immunogenic protein carrier, such as bovine serum albumin (BSA) or ovalbumin (OVA) via its primary amine group. (justia.com)
  • Consequently, only the imidazole will be exposed to lymphocytes, which commonly results in generation of antibodies that recognize protein-bound histamine with only limited affinity and sensitivity for free histamine. (justia.com)
  • Our extensive validation and advanced technical support ensures that all of our IHC-P-validated antibodies can be used for fluorescent multiplex IHC. (cellsignal.com)
  • Sandia Biotech's recombinant fluorescent antibody derivatives, FluorAbodies®, are not derived from animal hosts, they are recombinant (derived from bacteria) intrinsically fluorescent proteins that offer a number of advantages when compared to fluorochrome-labeled antibodies. (sandiabio.com)
  • This study investigated fluorescent protein expression in the shallow-water coral Acropora yongei during a 30 day laboratory photoacclimation experiment in the context of its dinoflagellate symbionts. (biologists.com)
  • Other than providing an additional hue for multicolor imaging, initially the most promising aspect of ECFP was the potential for utility as a biosensor FRET partner with yellow fluorescent proteins in widefield and confocal microscopy using blue-violet filter sets or the 457-nanometer spectral line of an argon-ion laser. (luyoruv.com)
  • Greater photostability compared to EBFP also positions ECFP as a more useful protein for time-lapse imaging in localization and dynamics studies. (luyoruv.com)
  • By far the most successful applications using ECFP have taken advantage of the ability of this variant to be coupled with yellow fluorescent protein ( YFP ) and derivatives to generate FRET biosensors capable of monitoring a wide spectrum of intracellular processes (see Figure 3). (luyoruv.com)
  • Fluorescent microscopy of transiently transfected mammalian cells expressing Phi-Yellow proteins. (evrogen.com)
  • Fluorescent microscopy of stably transfected mammalian cells expressing PhiYFP in cytosol. (evrogen.com)
  • 1995]. When expressed in mammalian cells, this variant provides green fluorescent labeling of mitochondria. (evrogen.com)
  • This Registered Report describes an extensive comparison of 22 near-infrared fluorescent proteins in vitro, in cultured mammalian cells, and in model animals, clarifying top performers in diverse biological settings. (springernature.com)
  • Here, the fluorescent protein is used to indicate which of the neurons has been manipulated to become the on and off switch. (microscopemaster.com)
  • For instance, researchers used this method to introduce genetic machinery, which randomly mixes green, cyan and yellow fluorescent proteins in various individual neurons to create a palette of 90 distinctive hues of colors. (microscopemaster.com)
  • For example, if the expression of a green fluorescent protein is driven by the expression of PTF1A, a gene expressed only in amacrine and horizontal retina neurons, only these two cell types will be labelled green. (bluesci.co.uk)
  • In Brainbow mice, neurons randomly choose combinations of red, yellow and cyan fluorescent pro. (cellimagelibrary.org)
  • In Brainbow mice, neurons randomly choose combinations of red, yellow and cyan fluorescent proteins, so that they each glow a particular. (cellimagelibrary.org)
  • Some neurons express the green fluorescent protein (GFP) - shown in green under the control of a specific promotor. (cellimagelibrary.org)
  • To achieve this, preliminary studies were conducted in which we plated different ratios of PFC neurons (fluorescent cells) to NAc neurons (nonfluorescent cells), as determined by cell counting before plating, and investigated the cells after 2 weeks (and supplemental Figs. 2= 17C24, Dunn's test, * 0.05 compared with control group, SCH group, and SCH + SKF group). (bakingandbakingscience.com)
  • Phi-Yellow proteins can be used in multicolor labeling applications with blue, cyan, green, red, and far-red fluorescent dyes. (evrogen.com)
  • Fluorophores for STORM and SMLM include synthetic dyes, fluorescent proteins (FPs), and even Quantum Dots (QDots). (microscopyu.com)
  • Because PE-tandem dyes are cross-excited by both the blue and yellow-green lasers, the replacement of these dyes with NovaFluor Blue 660-120S dye can allow detection of an additional marker labeled with, for example, NovaFluor Yellow 660 dye. (thermofisher.com)
  • DyLight fluorescent dyes are a new family of dyes with improved brightness and photostability). (abbkine.com)
  • They are better than or comparable to the best fluorescent dyes from other companies). (abbkine.com)
  • DyLight fluorescent dyes are highly water soluble and remain fluorescent from pH 4 to pH 9). (abbkine.com)
  • Cells can be visualised by labelling them with dyes, or more commonly, adding genes that code for fluorescent proteins, which are produced only when the cells coexpress a certain gene. (bluesci.co.uk)
  • We report a monomeric yellow-green fluorescent protein, mNeonGreen, derived from a tetrameric fluorescent protein from the cephalochordate Branchiostoma lanceolatum . (nature.com)
  • mNeonGreen is the brightest monomeric green or yellow fluorescent protein yet described to our knowledge, performs exceptionally well as a fusion tag for traditional imaging as well as stochastic single-molecule superresolution imaging and is an excellent fluorescence resonance energy transfer (FRET) acceptor for the newest cyan fluorescent proteins. (nature.com)
  • Phi-Yellow proteins can be easily expressed and detected in a wide range of organisms. (evrogen.com)
  • Suitability of Phi-Yellow proteins to generate stably transfected cells has been proven by Marinpharm company. (evrogen.com)
  • Despite dimerization capacity, Phi-Yellow proteins demonstrate successful performance in fusions with subcellular localization signals and many cellular proteins. (evrogen.com)
  • These include brown (N morph), yellow green (G), and purple (P) forms. (nih.gov)
  • The list below is sorted with highest emission maximum (far-red) at the top, followed by red fluorescent proteins, yellow, green and cyan. (takarabio.com)
  • PD-L2 (orange), PD-L1 (E1L3N ® ) (red), CD68 (green), PD-1 (yellow), CD8α (magenta) and Pan-Keratin (cyan) on FFPE tonsil. (cellsignal.com)
  • A 3-plex Fluorescent mIHC analysis of paraffin-embedded human breast cancer using PD-L1 (E1L3N ® ) XP ® Rabbit mAb #13684 (green), CD3ε (D7A6E ™ ) XP ® Rabbit mAb #85061 (yellow), and CD8α (C8/144B) Mouse mAb (IHC Specific) #70306 (Red). (cellsignal.com)
  • These tools are now available in three colors a(cyan, green, or yellow) and are marketed to the academic, biotechnology, and pharmaceutical research communities throughout the world. (sandiabio.com)
  • Yellow fluorescent protein, or YFP, is a GFP mutation. (eresearchco.com)
  • The current toolkit comprises two antibiotic resistance markers (paromomycin and hygromycin B), five codon-optimized light emission reporters, including the Gaussia princeps luciferase, as well as bright cyan, green, yellow, and red fluorescent protein variants. (edu.sa)
  • Depending on the input it will report by producing either cyan or yellow florescence. (igem.org)
  • Frederick Tsuji's lab independently reported the expression of the recombinant protein one month later. (wikipedia.org)
  • Due to its strategic design, this vector system can quickly be adapted to individual tasks and should therefore be of great use to address specific scientific questions requiring nuclear recombinant protein expression in C. reinhardtii. (edu.sa)
  • When expressed as a recombinant protein in transfected cells, PV 3A cofractionates with endoplasmic reticulum markers ( 66 ), and its single transient expression can disrupt the secretory apparatus ( 23 ) and decrease major histocompatibility complex (MHC) class I expression ( 22 ). (asm.org)
  • The Molar Extinction Coefficient (ε) for each protein was determined as follows: A = εcl (Beer-Lambert law) or ε = A/c, where A = absorbance, c = concentration (determined by the Bradford Protein Assay), l = path length (1 cm). (takarabio.com)
  • The current studies provide novel insights into the pharmacology of GPR40 and indicate that G protein-coupled receptors which respond to fatty acids, and potentially to other lipid ligands, can be occupied by endogenous agonists before assay and that this may mask the pharmacology of the receptor and may be mistaken for high levels of constitutive activity. (aspetjournals.org)
  • In this work, FMDV 3A homodimerization was evidenced by an in situ protein fluorescent ligation assay. (asm.org)
  • Replacements L38E and L41E, involving charge acquisition at residues predicted to contribute to the hydrophobic interface, reduced the dimerization signal in the protein ligation assay and prevented the detection of dimer/multimer species in both transiently expressed 3A proteins and in synthetic peptides reproducing the N terminus of 3A. (asm.org)
  • This fluorescent protein has a maximum emission wavelength of 450 nm. (eresearchco.com)
  • Most commercially available genes for GFP and similar fluorescent proteins are around 730 base-pairs long. (wikipedia.org)
  • Since the A. tenuis genome has been decoded, we identified five genes for green fluorescent proteins (GFPs), two for cyan fluorescent proteins (CFPs), three for red fluorescent proteins (RFPs), and seven genes for chromoprotein (ChrP). (nih.gov)
  • What distinguishes the SoFa fish from other labelling techniques is that the expression of the fluorescent markers in the retinal cells is switched on by genes that become active as progenitor cells commit to differentiation. (bluesci.co.uk)
  • The rapid expansion in biomedical research using live-cell imaging techniques over the past several years has been fueled by a combination of events that include dramatic advances in spinning disk confocal microscopy instrumentation coupled with the introduction of novel ultra-sensitive detectors and continued improvements in the performance of genetically-encoded fluorescent proteins. (fsu.edu)
  • Using fluorescence microscopy, biologists commonly introduce a gene that encodes an engineered fluorescent protein into living cells and then examine the location and dynamics of the gene product. (eresearchco.com)
  • By allowing researchers to use molecular cloning techniques to fuse the fluorophore moiety to a wide variety of protein and enzyme targets in order to monitor cellular processes in living systems using optical microscopy and related methods, the early 1960s discovery of green fluorescent protein ultimately heralded a new era in cell biology. (eresearchco.com)
  • The green fluorescent protein and its colorshifted genetic derivatives have been of great use in many thousands of live-cell imaging experiments thanks to recent technological advancements in wide field fluorescence and confocal microscopy, such as ultrafast low light level digital cameras and multitracking laser control systems. (eresearchco.com)
  • It may be difficult to prove that an entire fusion protein is being made through microscopy. (microscopemaster.com)
  • Localization of the fluorescently tagged protein was observed in the chloroplast pyrenoid via live cell fluorescence microscopy, the first report of heterologous protein localization to this cellular structure. (edu.sa)
  • The company is specializing in novel proprietary antibody and protein based reagents for use by biomedical research scientists. (sandiabio.com)
  • Suggested starting 1:50-1:1000 dilutions for most fluorescent applications, while 1:10000 dilutions for fluorescent assays with LI-1:COR® Odyssey equipment would be recommended. (abbkine.com)
  • In vitro assays confirm that both drugs inhibit the human protein TMPRSS2, a SARS-Cov-2 spike protein activator. (rsc.org)
  • Although fluorescent synthetic materials are already available for use as tracking codes, the substances from which they are made are potentially unsafe to consume. (photonics.com)
  • In this review, we first highlight synthetic biology techniques such as directed evolution as a toolset for protein engineering and show direct applications for food safety and security. (mdpi.com)
  • The unique property of being selfsufficient to form a visible wavelength chromophore from a sequence of three amino acids within their own polypeptide sequence distinguishes fluorescent proteins from other structurally homologous proteins. (eresearchco.com)
  • Structurally it is very similar to cyan fluorescent proteins (CFP), and have an emission spectrum of 500-525nm. (reefbuilders.com)
  • Confocal imaging and 3D reconstruction analyses for detecting the protein expression and subcellular localization of microglia in vivo. (bvsalud.org)
  • Confocal micrograph of "lost" axons - chick interneurons labeled with green fluorescent protein that were transplanted from older into younger embryos. (cellimagelibrary.org)
  • Scientists Roger Y. Tsien, Osamu Shimomura, and Martin Chalfie were awarded the 2008 Nobel Prize in Chemistry on 10 October 2008 for their discovery and development of the green fluorescent protein. (wikipedia.org)
  • Fluorescent Protein Technology - It took over thirty years, and the advent of recombinant DNA as well as vastly improved molecular biological approaches to see the pioneering work of Osamu Shimomura developed into a useful tool for live-cell imaging by Doug Prasher and Martin Chalfie. (fsu.edu)
  • Green fluorescence increased ∼1.9 times in high light corals and decreased ∼1.9 times in low light corals compared with medium light corals. (biologists.com)
  • Fluorescent proteins play pivotal roles in physiological regulation of corals. (nih.gov)
  • In this article we skim the surface of coral fluorescence in a manner most rudimentary, and take a look at some examples of fluorescent proteins displayed by the corals in the Triton display tank . (reefbuilders.com)
  • Since we would like to separate four different end states, we use four different fluorescent proteins to encode them. (igem.org)
  • The viral particle is composed of a protein capsid that contains a positive-sense RNA molecule of about 8,500 nucleotides that is infectious and encodes a single polyprotein, which is processed in infected cells by cis - and trans -acting viral proteases ( 55 ) to yield different polypeptide precursors and the mature viral proteins ( 9 , 62 ). (asm.org)
  • FluorAbodies® - In November 2015, Sandia Biotech licensed a patented, recombinant fluorescent antibody platform from STC.UNM, the technology transfer organization of the University of New Mexico and Queen Mary University London to develop a novel panel of recombinant intrinsically fluorescent antibody derivatives. (sandiabio.com)
  • Continued efforts using directed evolution approaches will no doubt improve the spectral characteristics, photostability, maturation time, brightness, acid resistance, and utility of the fluorescent protein tags for cellular imaging. (fsu.edu)
  • Despite the host of improvements in CFP and the large database of experiments performed with this variant, continued investigation has produced additional useful fluorescent proteins in the cyan spectral class. (luyoruv.com)
  • Fig.2.To use the DyLight Fluors with fluorescent imagers, use a spectral line of the blue laser diode for DyLight 405, a cyan (488 nm) laser for DyLight 488, a green (526 nm) laser for DyLight 550 and 594, and a red (633 nm) laser for DyLight 633 and 650. (abbkine.com)
  • The system has demonstrated robust functional flexibility with signal options to target the protein of interest to the cytoplasm, the nucleus, cellular microbodies, the chloroplast, mitochondria, or via the endoplasmic reticulum-Golgi apparatus secretory pathway into the culture medium. (edu.sa)
  • Most of the fluorescent proteins that are commonly used today have been modified through mutagenesis to optimize their expression in biological systems. (fsu.edu)
  • Among the improved cyan fluorescent proteins that have recently been introduced, CyPet and an enhanced cyan variant termed Cerulean show the most promise as fusion tags, FRET biosensors, and for multicolor imaging (see Figures 1, 3, and 11). (luyoruv.com)
  • Green fluorescent protein has been engineered to produce a plethora of diversely colored mutants, fusion proteins, and biosensors that are collectively referred to as fluorescent proteins since these initial studies. (eresearchco.com)
  • Cyan Fluorescent Protein (CFP) is a versatile biological marker for monitoring physiological processes, visualizing protein localization, and detecting transgenic expression in vivo. (luyoruv.com)
  • No cytotoxic effects or visible protein aggregation are observed. (evrogen.com)
  • The critical mutation is the substitution of lysine for alanine at position 206 ( A206K ), which can be applied to virtually any Aequorea victoria variant in order to generate a true monomer capable of superior performance in applications such as localization, FRET, and protein dynamics. (luyoruv.com)
  • Förster Resonance Energy Transfer - FRET is used for the purposes of studying interactions between two proteins or domains of protein undergoing conformational change. (microscopemaster.com)
  • In the 1960s and 1970s, GFP, along with the separate luminescent protein aequorin (an enzyme that catalyzes the breakdown of luciferin, releasing light), was first purified from the jellyfish Aequorea victoria and its properties studied by Osamu Shimomura. (wikipedia.org)
  • The viral genome encodes four structural capsid proteins (VP1 to VP4) and seven nonstructural (NS) proteins, the leader Lb/ab protease, and proteins encoded in the P2 (2B and 2C) and P3 (3A, 3B, 3C, and 3D) regions ( 9 ). (asm.org)
  • 10-13 TMPRSS2 contains an extracellular trypsin-like serine-protease domain that can proteolytically activate the spike (S) protein on the surface of SARS-CoV-2 viral particles 14 ( Fig. 1 ). (rsc.org)
  • For example, tumors may evade immune detection by manipulating the expression of immune checkpoint proteins (e.g. (cellsignal.com)
  • Alternatively, T cells may become less effective at destroying tumor cells as they succumb to exhaustion, a phenomenon characterized by changes in immune checkpoint protein expression, T cell expression of VISTA , and the appearance of CD68+ co-infiltrating macrophages. (cellsignal.com)
  • The biological research community was quick to recognize the unique value of a genetically encoded fluorophore as a marker of gene expression and protein localization, armed with the arsenal of potent molecular biology techniques developed over the previous two decades. (eresearchco.com)
  • In hindsight, the first demonstrations of recombinant expression in organisms other than jellyfish and the cloning of the gene represent a clearly discernible turning point in the history of fluorescent protein research. (eresearchco.com)
  • Although the gene for green fluorescent protein was first cloned in 1992, it wasn't until several years later that fusion products were used to track gene expression in bacteria and nematodes that the gene's significant potential as a molecular probe was realized. (eresearchco.com)
  • Whether Vpu is a viral pathogenesis factor remains to be established, but compared to HIV-1, closely related retroviruses such as HIV-2 and SIV that lack expression of a fully functional Vpu protein also cause less severe disease outcomes. (biomedcentral.com)
  • We present a versatile vector toolkit for nuclear transgene expression in the model green microalga Chlamydomonas reinhardtii. (edu.sa)
  • In cells lacking expression of Ca 2+ -mobilizing G proteins, coexpression of human GPR40 and Gα q allowed medium- and long-chain fatty acids to elevate intracellular [Ca 2+ ]. (aspetjournals.org)
  • Engineered resonance energy transfer (RET) between a mTurquoise2 fluorescent protein and FMN-bound As LOV2 increases switch sensitivity. (nature.com)
  • Tissue autofluorescence can be an issue often contributing to poor sensitivity in fluorescent IHC. (cellsignal.com)
  • They are available on our website as protein, detection and analysis tools and also through our distributors, (MilliporeSigma, Funakoshi, Interchim, Protein Technologies). (sandiabio.com)
  • As one of the primary focuses of my lab is the development and application of fluorescent proteins, we immediately decided to use this unique opportunity to conduct a systematic and quantitative comparison of 22 most popular NIR FPs. (springernature.com)
  • Using Vpu proteins from a primary subtype C and the pNL4-3 subtype B isolates of HIV-1, we show oligomerization of the full-length protein as well as its transmembrane (TM) domain by genetic, biochemical and biophysical methods. (biomedcentral.com)
  • We posited that the behavioural traits of individual cells contain biological insights on the individual cells' genetic and protein content, as well as their signalling networks9, which can be used to describe persistent cell identities or transient states in their native environment (Fig. 1a). (studylib.net)
  • The green fluorescent protein (GFP) is a protein that exhibits bright green fluorescence when exposed to light in the blue to ultraviolet range. (wikipedia.org)
  • Blue pseudocolor = DAPI #8961 (fluorescent DNA dye). (cellsignal.com)
  • By changing a tyrosine residue to a histidine at position 66, blue fluorescent protein was made. (eresearchco.com)
  • The Caulestra above when seen under deep blue LEDs in a dark tank shows a lustrous almost gem like quality as it emits light from the cyan proteins. (reefbuilders.com)
  • Each molar extinction coefficient was determined at the absorption maxima of its respective protein. (takarabio.com)
  • A molecular model of the FMDV 3A protein, derived from the nuclear magnetic resonance (NMR) structure of the poliovirus 3A protein, predicted a hydrophobic interface spanning residues 25 to 44 as the main determinant for 3A dimerization. (asm.org)
  • Studies from our research group have shown that annexin A1 protein (AnxA1) is involved in the regulation of inflammation and cell proliferation. (bvsalud.org)
  • Therefore, fusing the GFP gene to the gene of a protein of interest can significantly increase the protein's size and molecular mass, and can impair the protein's natural function or change its location or trajectory of transport within the cell. (wikipedia.org)
  • Thus, molecular profiling of immune checkpoint proteins together with immune cell phenotyping is key to understanding the complex tumor microenvironment and to enabling the development of tailored, combinatorial therapeutic intervention. (cellsignal.com)
  • To help block the flow of counterfeit medications, researchers at Purdue University and the National Institute of Agricultural Sciences in South Korea developed edible fluorescent tags that can be coded and added to pills or liquid medicine. (photonics.com)
  • An app designed by the researchers is used to scan the fluorescent pattern and extract a digitized security key augmented by a deep neural network for overcoming code patterns erroneously formed during fabrication, and a cryptographic hash function for enhanced security. (photonics.com)
  • To test the ability of the fluorescent code to work with alcohol-based liquid medicines, the researchers placed a coded silk film in a bottle of whisky and found that the fluorescent code was still readable with the app. (photonics.com)
  • By attaching the gene of this protein to the gene of a given protein or an organism, scientists and researchers can easily observe any protein of interest given that GFP fluoresces. (microscopemaster.com)
  • They genetically modified silkworms to produce silk fibroins - edible proteins that give silk fibers their strength - with a cyan, green, or red fluorescent protein attached. (photonics.com)
  • They then dissolved the fluorescent silk fibroins to create fluorescent polymer solutions, which they applied onto a thin, 9-mm-wide film of white silk placed on a square grid. (photonics.com)
  • Silkworms can produce edible, fluorescent silk cocoons (left side of left image). (photonics.com)
  • Investigation of the digestibility of the proposed edible codes showed that the fluorescent silk proteins are broken down by gastrointestinal enzymes. (photonics.com)
  • The primary protein comprising silk is fibroin, and in the last century, it has been intensely studied for a variety of advanced applications beyond luxurious fabrics. (ill.eu)
  • Successful fluorescent reporter protein fusion to C. reinhardtii Rubisco small subunit 1 was accomplished with this system. (edu.sa)
  • Its emission peak is at 509 nm, which is in the lower green portion of the visible spectrum. (wikipedia.org)
  • Just in the past decade, however, we have witnessed a truly remarkable expansion in the fluorescent protein palette, largely driven by the innovative studies from Roger Tsien's laboratory. (fsu.edu)
  • Since BphP/CBCR-derived FPs are often the proteins of choice for in vivo imaging, end users would be required to express FPs in model organisms. (springernature.com)
  • Remarkably, the GFP molecule folded and was fluorescent at room temperature, without the need for exogenous cofactors specific to the jellyfish. (wikipedia.org)
  • G Protein Estrogen Receptors- Sandia Biotech offers agonists and antagonists for the G-protein estrogen receptor (GPER) signaling pathway that is important in a number of cancers. (sandiabio.com)
  • Other PTFPs can be reversibly switched from on states to off states by alternating cyan and violet light (so-called reversibly photoswitchable FPs, RSFPs). (ibs.fr)
  • Green fluorescent protein (GFP) concentration measured by Western blotting changed reversibly with light intensity. (biologists.com)
  • For the past 25 years, scientists have been developing fluorescent proteins for bioimaging. (ill.eu)
  • Q FP = (Q fluo * F FP * OD fluo ) / (F fluo * OD FP ), where F is the fluorescence and OD is the optical density of either the fluorescent protein (FP) or the reference fluorophore (fluo). (takarabio.com)
  • Photoreceptors and bipolar cells are labelled in cyan, amacrine and horizontal cells are green and retinal ganglion cells are red. (bluesci.co.uk)
  • This was also observed when human embryonic kidney (HEK) 293 cells were transfected with a GPR40-Gα q fusion protein. (aspetjournals.org)
  • NS proteins are involved in crucial aspects of the viral cycle and pathogenesis, such as rearrangements of intracellular membranes required for endomembrane recruitment and the lysis of host cells ( 1 , 12 , 14 , 18 , 73 ). (asm.org)