CGSC Strain#: 5447
Strain Designation: ICR48      Source of Strain: W.A. Newton
Sex: Hfr    Point of Origin#: 1   Map Position: 96.80   Direction of Marker Transfer: Clockwise
Chromosomal Markers: lacZ75(Fs), λ^-, relA1, spoT1, thiE1
Strain Comments:

• lacZ75(Fs)-- is a frameshift mutation.
• 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
• Fs = Frameshift mutation

References:

• Newton, A 1970. Isolation and characterization of frameshift mutations in the lac operon. J. Mol. Biol. 49(3):589-601.