CGSC Strain#: 6073
Strain Designation: AB2154      Source of Strain: A.J. Pittard
Sex: Hfr    Point of Origin#: 13   Map Position: 84.98   Direction of Marker Transfer: Counterclockwise
Chromosomal Markers: thr-1, leuB6(Am), lacZ4, glnX44(AS), P1+, rpsL8, metE47, 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:

• Pittard, J 1964. Effect of phage-controlled restriction on genetic linkage in bacterial crosses. J. Bacteriol. 87(5):1256-7.
• Pittard, J, EM Walker 1967. Conjugation in Escherichia coli: recombination events in terminal regions of transferred deoxyribonucleic acid. J. Bacteriol. 94(5):1656-63.