1. something created or constructed [n -S] / fabulous [adj FABBER, FABBEST] - See also: fabulous
Medical Definition of Fab
1. Fragment of immunoglobulin prepared by papain treatment. Fab fragments (45 kD) consist of one light chain linked through a disulphide bond to a portion of the heavy chain and contain one antigen binding site. They can be considered as univalent antibodies.
This entry appears with permission from the Dictionary of Cell and Molecular Biology
(11 Mar 2008)
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