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Galactoside acetyltransferase (also known as Galactoside O-acetyltransferase, thiogalactoside transacetylase, β-galactoside transacetylase and GAT) is an enzyme that transfers an acetyl group from acetyl-CoA to β-galactosides, glucosides and lactosides. It is coded for by the lacA gene of the lac operon in E. coli. [1]
The lactose operon (lac operon) is an operon required for the transport and metabolism of lactose in E. coli and many other enteric bacteria.Although glucose is the preferred carbon source for most enteric bacteria, the lac operon allows for the effective digestion of lactose when glucose is not available through the activity of β-galactosidase. [1]
An acetyltransferase (also referred to as a transacetylase) is any of a class of transferase enzymes that transfers an acetyl group in a reaction called acetylation.In biological organisms, post-translational modification of a protein via acetylation can profoundly transform its functionality by altering various properties like hydrophobicity, solubility, and surface attributes. [1]
In E. coli, the lacZ gene is the structural gene for β-galactosidase; which is present as part of the inducible system lac operon which is activated in the presence of lactose when glucose level is low. β-Galactosidase synthesis stops when glucose levels are sufficient. [2] β-Galactosidase has many homologues based on similar sequences.
The A and B transferases are the foundation of the human ABO blood group system. Both A and B transferases are glycosyltransferases, meaning they transfer a sugar molecule onto an H-antigen. [ 64 ] This allows H-antigen to synthesize the glycoprotein and glycolipid conjugates that are known as the A/B antigens . [ 64 ]
Carsten Goerling/Getty Images. 11. Ghost or Ghosting. To stop talking to someone without cause or notice. Usually this happens quite unexpectedly and is cause for major confusion and a whole lotta ...
Meaning L: leukocytes lumbar vertebrae (L1 to L5) L&D: labor and delivery: LA: left atrium lymphadenopathy local anesthetic: LAAM: L-alpha-acetylmethadol: Lab: laboratory (in health care, usually referring to clinical laboratory) LABA: long-acting beta agonist: LABBB: left anterior bundle branch block: Lac: laceration lactate: LAD: left ...
A portrait of a mystery woman was found beneath Pablo Picasso's "Portrait of Mateu Fernández de Soto" by the Courtauld Institute of Art in London.