CGSC Strain#: 2561
Strain Designation: AB2561      Source of Strain: G. Eggertsson
Sex: Hfr    Point of Origin#: 13   Map Position: 84.98   Direction of Marker Transfer: Counterclockwise
Chromosomal Markers: leuB6(Am), lacZ4, glnX44(AS), lysV123(OS), rpsL8, ilvD188(Oc), thiE1
Strain Comments:

• The supN23( lysU123) marker has apparently been lost in this strain.
• 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
• lysV123(OS) was formerly called supN23
• thiE1 was formerly called thi-1
• Am = amber(UAG) mutation
• AS = amber(UAG) suppressor
• Oc = ochre(UAA) mutation
• OS = ochre(UAA) suppressor

References:

• Eggertsson, G., E.A. Adelberg 1965. Map positions and specificities of suppressor mutations in Escherichia coli K-12. Genetics 52:319-340