CGSC Strain#: 253
Strain Designation: W208,SR      Source of Strain: Paris Strain
Sex: F- Chromosomal Markers: thr-1, leuB6(Am), lacZ4, glnX44(AS), rpsL8, thiE1
Strain Comments:

• leuB6(Am)-- Suppressed by serU suppressor (supH)
• glnX44(AS)-- Mutation is a C to T transition at nucleotide 34 (3rd position of the anticodon)
• glnX44(AS) was formerly called su⁺_II
• glnX44(AS) was formerly called supE44
• glnX44(AS) was formerly called glnV44
• thiE1 was formerly called thi-1
• Am = amber(UAG) mutation
• AS = amber(UAG) suppressor

References:

• Adelberg, E.A., S.N. Burns 1960. Genetic variation in the sex factor of Escherichia coli. J.Bacteriol. 79:321-330