lac operon

(redirected from Lacz)
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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.

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.

lac operon

the genetic system of Escherichia coli that is required to metabolize lactose and on which the OPERON MODEL is based.

lac operon

the lactose operon, a nucleotide sequence in Escherichia coli that controls the synthesis of the enzyme β-galactosidase comprising binding sequence motifs for the cap protein, which activates transcription, the repressor protein, which inhibits transcription, and a region with which RNA polymerase interacts. The first, best studied and best understood model for gene regulation.
References in periodicals archive ?
The star-studded event includedSeth Rogen, Harry Carson, Jessie Close, Kevin Lacz andFran Drescher .
Additionally, contaminated municipal water supplies are believed to be major transmitter of disease causing bacterial genes such as lacZ, uidA and E.
Bradley Cooper stars alongside Sienna Miller, Luke Grimes, Jake McDorman, Cory Hardrict, Kevin Lacz, Navid Negahban and Keir O'Donnell.
Cooper trained with Navy Seal sniper Kevin Lacz, who served with Kyle and was a consultant for the movie, while another former Navy Seal, Joel Lambert, portrays a Delta sniper.
The presence of iCre or LacZ was determined by PCR using the primer pairs listed in table 1.
lacZ is one of the lac operon genes encoding for <beta>-galactosidase by which lactose is hydrolysed.
The team is working with Jim Petrucci, Greg Rogerson, and Dan Lacz, from J.
In Sd197 and Ss046 (late lactose-fermenting strains), the key gene, lacZ (encoding b-D-galactosidase) is intact, although lacY (encoding galactose permease) is a pseudogene (12).
aeruginosa qsc 119 was constructed using a chromosomal promoter under the control of AHLs linked to lacZ.
Transformation efficiency was monitored using the CAG promoter-driven pCAGGS plasmid with a lacZ gene insert at the EcoRI site.
The LacZ gene is always required to be part of the plasmids in order to perform the cloning procedure.