CGSC Strain#: 5809
Strain Designation: M7040     
Source of Strain: J.R. Beckwith
Sex: F-
Chromosomal Markers: lacZ82(Am)
,
λ-,
relA1,
rpsL150(strR),
spoT1Strain Comments: - lacZ82(Am)-- comes from strain Hfr 3000 X82. It is an amber mutation.
- rpsL150(strR)-- T to C transition mutation resulting in a K43R amino acid substitution.
- spoT1-- In addition to the 6bp insertion, there is a C to T transition resulting in an H257Y substitution.
- Am = amber(UAG) mutation
- strR = streptomycin resist.
References: - Newton, W.A., J.R. Beckwith, D. Zipser, S. Brenner 1965. Nonsense mutants and polarity in the lac operon of Escherichia coli. J.Mol.Biol. 14:290-296