CGSC Strain#: 5085
Strain Designation: LA-12G      Source of Strain: B. Magasanik
Sex: F+ Chromosomal Markers: λ^-, ptsG21, e14-, relA1, spoT1, thiE1
Strain Comments:

• ptsG21-- was formerly called cat-1 and, later, gpt-1.
• e14--- : Loss of the e14 element makes the strain McrA^-.
• spoT1-- In addition to the 6bp insertion, there is a C to T transition resulting in an H257Y substitution.
• thiE1 was formerly called thi-1

References:

• Loomis, W.F., B. Magasanik 1965. Genetic control of catabolite repression of the lac operon in Escherichia coli. Biochem.Biophys.Res.Commun. 20:230-234
• Tyler, B, R Wishnow, WF Loomis, B Magasanik 1969. Catabolite repression gene of Escherichia coli. J. Bacteriol. 100(2):809-16.