| ab- | 1. <prefix> A prefix meaning from or away from, off. 2. Applied to electrical units in the CGS-electromagnetic system to distinguish them from units in the CGS-electrostatic system (prefix stat-) and those in the metric system or SI system (no prefix). Origin: L. Ab, from, usually abs-before c, q, and t; often a-before m, p, or v (05 Mar 2000) |
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| AB-C protease | <enzyme> From agkistrodon bilineatus; activates protein c; inhibited by calcium; amino acid sequence given in first source Registry number: EC 3.4.21.- (26 Jun 1999) |