CGSC Strain#: 7285
Strain Designation: SC18      Source of Strain: E. Ephrati-Elizur
Sex: F- Chromosomal Markers: thr-1, psu-1, leuB6(Am), Δ(gpt-proA)62, lacY1, λ^-, tyrT5888(AS), hisG4(Oc), rpsL31(strR), argE3(Oc)
Strain Comments:

• This strain shares 7 of the markers of AB1157, and if related it may carry these additional markers: xylA5, mtl-1, thi-1, araC14, tsx-33.
• leuB6(Am)-- Suppressed by serU suppressor (supH)
• Δ(gpt-proA)62 was formerly called proA2
• Am = amber(UAG) mutation
• AS = amber(UAG) suppressor
• Oc = ochre(UAA) mutation
• strR = streptomycin resist.

References:

• Ephrati-Elizur, E. 1993. A mutation in a new gene of Escherichia coli, psu, requires secondary mutations for survival: psu mutants express a pleiotropic suppressor phenotype. J.Bacteriol. 175:207-213