lac operon

(redirected from Lac promoter)
Also found in: Medical.

lac operon

[′lak ′äp·ə‚rän]
(genetics)
Three adjacent linked genes which code for the enzymes that act sequentially in lactose utilization in many bacteria.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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As a positive control for pMR1-Pjx analysis, wild type lac promoter (Plac), which is regulated by CRP, was used.
coli cat gene under the control of the lac promoter, they found that CAT (chloramphenicol acetyltransferase) production was reduced by more than 90 percent in a mutant in which an open reading frame overlapped the cat coding sequence out-of-frame.