lyase

lyase

 [li´ās]

any of a class of enzymes that remove groups from their substrates (other than by hydrolysis), leaving double bonds, or that conversely add groups to double bonds.

Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

ly·ase

(lī'ās),

Class name for those enzymes removing groups nonhydrolytically (EC class 4); prefixes such as "hydro-" and "ammonia-" are used to indicate the type of reaction. Trivial names for lyases include synthases, decarboxylases, aldolases, and dehydratases. Compare: synthase, synthetase.

Farlex Partner Medical Dictionary © Farlex 2012

lyase

(lī′ās′)

n.

Any of a group of enzymes that catalyze the cleavage of bonds without hydrolysis or oxidation, often resulting in a new double bond or ring structure, or that catalyze the addition of chemical groups to double bonds.

The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

ly·ase

(lī'ās)

Class name for enzymes removing groups nonhydrolytically (EC class 4); prefixes such as "hydro-," and "ammonia-" are used to indicate the type of reaction. Trivial names for lyases include synthases, decarboxylases, aldolases, dehydratases.
Compare: synthase, synthetase

Medical Dictionary for the Health Professions and Nursing © Farlex 2012

lyase

an enzyme that catalyses

1. the addition of groups to double bonds,
2. the removal of groups to form double bonds.

Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005