• lactose
  • Since gallactose is what the cell wants the most then the other metabolic operons(like lactose) should be off so any sugar that isn't gallactose is secondary? (biology-online.org)
  • Although glucose is the preferred carbon source for most bacteria, the lac operon allows for the effective digestion of lactose when glucose is not available through the activity of beta-galactosidase. (wikipedia.org)
  • prokaryotes
  • There's never been a definitive explanation for why nature would preferentially select for operons in prokaryotes but not in eukaryotes," said Igoshin, associate professor of bioengineering at Rice. (rice.edu)
  • Originally, operons were thought to exist solely in prokaryotes (which includes organelles like plastids that are derived from bacteria), but since the discovery of the first operons in eukaryotes in the early 1990s, more evidence has arisen to suggest they are more common than previously assumed. (wikipedia.org)
  • Operons occur primarily in prokaryotes but also in some eukaryotes, including nematodes such as C. elegans and the fruit fly, Drosophila melanogaster. (wikipedia.org)
  • Here only IMD genes are guanine sensitive and not gua1 unlike in prokaryotes where the entire operon is sensitive. (wikipedia.org)
  • Nobel Prize in P
  • The 1965 Nobel Prize in Physiology and Medicine was awarded to François Jacob, André Michel Lwoff and Jacques Monod for their discoveries concerning the operon and virus synthesis. (wikipedia.org)
  • Their work on the lac operon won them the Nobel Prize in Physiology in 1965. (wikipedia.org)
  • genetic
  • The purpose of this work is two-fold: (1) to develop a novel mathematical and computational framework that incorporates the major sources of cell population heterogeneity and (2) to use this framework to demonstrate the effect of stochasticity on cell population heterogeneity in an artificial lac operon genetic network. (rice.edu)
  • synthesis
  • Eurofins MWG Operon, based in Ebersberg, Germany, and a member of the Eurofins Group, is one of the leading global providers of DNA sequencing services, DNA synthesis products and bioinformatics services for academic and industrial research. (bio-medicine.org)
  • The gua operon is responsible for regulating the synthesis of guanosine mono phosphate(GMP), a purine nucleotide, from inosine monophosphate (IMP or inosinate). (wikipedia.org)
  • Biology
  • In new research published online this week in PLOS Computational Biology, Rice's Oleg Igoshin and MD Anderson's Christian Ray offer a possible explanation for the existence of jointly controlled clusters of genes called operons, which are found in bacterial chromosomes but not in those of higher order organisms like humans. (rice.edu)
  • In molecular biology, the ars operon is an operon found in several bacterial taxon. (wikipedia.org)
  • regulate
  • These results, combined with estimates of intracellular Ni2+ and NikR concentrations, lead to the conclusion that NikR is able to sense Ni2+ and regulate the nik operon expression over a range of intracellular Ni2+ concentrations from as low as one to as high as 10,000 molecules per cell. (wikipedia.org)
  • ArsD and ArsR work together to regulate the ars operon. (wikipedia.org)
  • homeostasis
  • The gab operon is also known to contribute to polyamine homeostasis during nitrogen-limited growth and to maintain high internal glutamate concentrations under stress conditions. (wikipedia.org)
  • The gab operon contributes to homeostasis of polyamines such as putrescine, during nitrogen-limited growth. (wikipedia.org)
  • Hence along with histidase, glnALG operon maintains homeostasis within the cell. (wikipedia.org)
  • amino
  • In each case the leader also codes for very short peptide sequence that is rich in the end product amino acid of the operon. (wikipedia.org)
  • promoters
  • The expression of genes in the operon is controlled by three differentially regulated promoters, two of which are controlled by RpoS encoded sigma factor σS. (wikipedia.org)
  • In order to combine each operon, the Ptac promoters were replaced with T7 promoters with strengths on the same order of magnitude as the predetermined optima. (openwetware.org)
  • glnG: encodes NRI , which regulates the expression of glnALG operon at three promoters, which are glnAp1, glnAp2 and glnLp. (wikipedia.org)
  • The expression of the glnALG operon is regulated by the NRI at three promoters: glnAp1, glnAp2 and glnLp. (wikipedia.org)
  • complex
  • The alpha operon ribosome binding site in bacteria is surrounded by this complex pseudoknotted RNA structure. (wikipedia.org)