CGSC Strain#: 4205
Strain Designation: JC1553      Source of Strain: A.J. Clark
Sex: F- Chromosomal Markers: leuB6(Am), fhuA2, lacY1, glnV44(AS), gal-6, λ^-, hisG1(Fs), rfbC1, recA1, galP63, argG6, rpsL104, malT1(λ^R), xyl-7, mtlA2, metB1
Strain Comments:

• leuB6(Am)-- Suppressed by serU suppressor (supH)
• recA1-- : Missense mutation, altered isoelectric point. Sequenced: G to A for Nuc. 720 (Gly 160 Asp).
• glnV44(AS) was formerly called supE44
• glnV44(AS) was formerly called su⁺_II
• rfbC1 was formerly called rfbD1
• xyl-7 was formerly called xylA7
• = strep-resistant
• Am = amber(UAG) mutation
• AS = amber(UAG) suppressor
• Fs = Frameshift mutation
• LamR = Lambda-resistant

References:

• Clark, A.J., A.D. Margulies 1965. Isolation and characterization of recombination-deficient mutants of Escherichia coli K12. Proc.Natl.Acad.Sci.USA 53:451-459
• Clark, A.J. 1967. The beginning of a genetic analysis of recombination proficiency. J.Cell.Physiol. 70:165-180
• Low, K.B. 1968. Formation of merodiploids in matings with a class of Rec- recipient strains of Escherichia coli K12. Proc.Natl.Acad.Sci.USA 60:160-167