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a unit of measurement proposed to express activities of all catalysts, including enzymes, being that amount of a catalyst that catalyzes a reaction rate of 1 mole of substrate per second. Symbol kat.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
1. Unit of catalytic activity equal to 1 mol of product formed (or substrate consumed) per second.
2. The amount of enzyme that catalyzes transformation of 1 mol of substrate per second.
Farlex Partner Medical Dictionary © Farlex 2012
Unit of catalytic activity equal to one mole of product formed (or substrate consumed) per second, as of the amount of enzyme that catalyzes transformation of one mole of substrate per second.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
katalA unit of enzyme activity in the SI system. 1 international unit is equal to 16.6 nanokatal.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005