CGSC Strain#: 5803
Strain Designation: EC-3      Source of Strain:
Sex: Hfr    Point of Origin#: 151(TP3-TOR30)   Map Position: 3.70   Direction of Marker Transfer: Counterclockwise
Chromosomal Markers: TP3-TOR30(lac+), Δ(gpt-lac)5, glnX44(AS), λ^-, relA1, thiE1
Strain Comments:

• Δ(gpt-lac)5-- is the deletion Δ( pro-lac)_X111 of Jacob and originated in the strain Hfr 3000 X111.
• 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
• AS = amber(UAG) suppressor
• lac+ = transposition includes 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