| EU | Ehrlich unit; elementary unit; emergency unit; endotoxin unit; entropy unit; enzyme unit; esterase u... |
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| G-6-PDA | glucose-6-phosphate dehydrogenase enzyme variant A |
| HE | half-scan with extrapolation; hard exudate; hektoen enteric [agar]; hemagglutinating encephalomyelit... |
| HEI | Health Effects Institute; high-energy intermediate; homogenous enzyme immunoassay; human embryonic i... |
| HMRTE | human milk reverse transcriptase enzyme |
| 1,4-alpha-glucan branching enzyme | <enzyme> In glycogen or amylopectin synthesis, the enzyme that catalyses the transfer of a segment of a 1,4-alpha-glucan chain to a primary hydroxy group in a similar glucan chain. Chemical name: 1,4-alpha-D-Glucan:1,4-alpha-D-glucan 6-alpha-D-(1,4-alpha-D-glucano)-transferase Registry number: EC 2.4.1.18 (12 Dec 1998) |
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| liver enzyme | <biochemistry> Special proteins found in the cells of the liver that are responsible for catalysing specific metabolic reactions. They may become elevated in the bloodstream in conditions of hepatitis or liver cancer. See: liver function tests. (27 Sep 1997) |
| lysosomal enzyme | <biochemistry> A range of degradative enzymes, most of which operate best at acid pH. The best known marker enzymes are acid phosphatase and glucuronidase, but many others are known. (18 Nov 1997) |