CGSC Strain#: 5804
Strain Designation: EC-7      Source of Strain: J.R. Beckwith
Sex: Hfr    Point of Origin#: 152(TP7-TOR70)   Map Position: 95.00   Direction of Marker Transfer: Clockwise
Chromosomal Markers: 151(TP3-TOR30), Δ(gpt-lac)5, glnV44(AS), λ^-, relA1, thiE1
Strain Comments:

• 151(TP3-TOR30)-- Carries TP3-TOR30 which transposes lac from F42-114 to point between proB and leu.
• Δ(gpt-lac)5-- is the deletion Δ( pro-lac)_X111 of Jacob and originated in the strain Hfr 3000 X111.
• glnV44(AS) was formerly called supE44
• glnV44(AS) was formerly called su⁺_II
• thiE1 was formerly called thi-1
• AS = amber(UAG) suppressor
• TP3-TOR30 = insertion of F42-114(ts)lac+

References:

• Beckwith, J.R., E.R. Signer 1966. Transposition of the lac region of Escherichia coli. I. Inversion of the lac operon and transduction of lac by phi 80. J.Mol.Biol. 19:254-265
• Beckwith, J.R., E.R. Signer, W. Epstein 1966. Transposition of the lac region of E. coli. Cold Spr.Harb.Symp.Quant.Biol. 31:393-401