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PRIME (probe incorporation mediated by enzymes) is a molecular biology research tool developed by Alice Y. Ting and the Ting Lab at MIT for site-specific labeling of proteins in living cells with chemical probes. [1] [2] Probes often have useful biophysical properties, such as fluorescence, and allow imaging of proteins. [1]
In enzymology, an aminoacylase (EC 3.5.1.14) is an enzyme that catalyzes the chemical reaction. N-acyl-L-amino acid + H 2 O ⇌ carboxylate + L-amino acid. Thus, the two substrates of this enzyme are N-acyl-L-amino acid and H 2 O, whereas its two products are carboxylate and L-amino acid.
Function and clinical importance of some enzymes in category 3.2.1. Amylase Function ... EC 6.2.1.49: Long-chain fatty acid adenylyltransferase FadD28;
The specific activity should then be expressed as μmol min −1 mg −1 active enzyme. If the molecular weight of the enzyme is known, the turnover number, or μmol product per second per μmol of active enzyme, can be calculated from the specific activity. The turnover number can be visualized as the number of times each enzyme molecule ...
The enzyme aspartate 1-decarboxylase (EC 4.1.1.11) catalyzes the chemical reaction. L-aspartate beta-alanine + CO 2. Hence, this enzyme has one substrate, L-aspartate, and two products, beta-alanine and CO 2. This enzyme belongs to the family of lyases, specifically the carboxy-lyases, which cleave carbon-carbon bonds.
The Enzyme Commission number (EC number) is a numerical classification scheme for enzymes, based on the chemical reactions they catalyze. [1] As a system of enzyme nomenclature, every EC number is associated with a recommended name for the corresponding enzyme-catalyzed reaction. EC numbers do not specify enzymes but enzyme-catalyzed reactions.
β-Glucosidase (EC 3.2.1.21; systematic name β-D-glucoside glucohydrolase) is an enzyme that catalyses the following reaction: [2] Hydrolysis of terminal, non-reducing β-D-glucosyl residues with release of β-D-glucose
Although the active site occupies only ~10–20% of the volume of an enzyme, [1]: 19 it is the most important part as it directly catalyzes the chemical reaction. It usually consists of three to four amino acids, while other amino acids within the protein are required to maintain the tertiary structure of the enzymes. [2]