CGSC Strain#: 6539
Strain Designation: LTF15      Source of Strain: N. Glansdorff
Sex: Hfr    Point of Origin#: 3   Map Position: 6.80   Direction of Marker Transfer: Counterclockwise
Chromosomal Markers: pyrH78, relA1, spoT1, udp-10, metB1, deoA75
Strain Comments:

• This strain may carry an uncharacterized mutation which permits the utilization of N-acetylglutamate as a source of arginine in the presence of an arginine auxotrophic mutation, mutation "X" of ancestor strain.
• spoT1-- In addition to the 6bp insertion, there is a C to T transition resulting in an H257Y substitution.

References:

• Pierard, A., N. Glansdorff, D. Gigot, M. Crabeel, P. Halleux, L. Thiry 1976. Repression of Escherichia coli carbamoylphosphate synthase: relationships with enzyme synthesis in the arginine and pyrimidine pathways. J.Bacteriol. 127:291-301