lac operon

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Lac op·er·on

(lahk),
a collection of adjacent bacterial genes responsible for the entry and metabolism of lactose; contains the genes coding for three enzymes and is flanked by a repressor and a promoter region to control expression.
Farlex Partner Medical Dictionary © Farlex 2012

lac operon

A sequence of genes found in many bacteria that codes for the enzymes needed to break down lactose to glucose and galactose so that the sugars can be utilized. Studies on the lac operon have been important in genetic research. The lactose repressor protein controls the transcription of the lac operon.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

lac operon

the genetic system of Escherichia coli that is required to metabolize lactose and on which the OPERON MODEL is based.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
(a) Defining the problem that LAC is designed to address
As Roy Parker (1998: 200), one of LAC's academic initiators, argues that LAC is not a panacea for the problems that have existed in the care system.
Thirdly, as a continuous process of care planning, LAC is built around and centred on the individual child (Dixon and Morwitzer 2001b: 8).
LAC is bureaucratising (form filling) and deskills the professionals
Garrett (1999a: 32-34) makes the point that there is no recognition that LAC is framed by a construction of children at a particular point in time.