CGSC Strain#: 12289
Strain Designation: TA563      Source of Strain: C.L. Squires
Sex: F- Chromosomal Markers: ara-600, Δ(codB-lacI)3, metB1, btuB3191::Tn10, thiE1
Strain Comments:

• Δ(codB-lacI)3-- is a deletion of the entire lac operon, from the strain Hfr 3000 X74 of Jacob. Refs. on extent of deletion: Sung et al.1987,J.Bact.169:2639; Gerdes et al.2001
• Δ(codB-lacI)3-- Shown by Ferrandez et al. 1997 to extend to mhpD
• Δ(codB-lacI)3-- Shown by Durfee et al. to extend from codon 292 of yahG through mhpE
• Δ(codB-lacI)3 was formerly called Δlac74
• Δ(codB-lacI)3 was formerly called Δ(lac)3
• Δ(codB-lacI)3 was formerly called Δ(yahG-mhpE)
• Δ(codB-lacI)3 was formerly called X74
• Δ(codB-lacI)3 was formerly called DE(lac)6
• thiE1 was formerly called thi-1
• = tetracycline resistant

References:

• Asai, T, D Zaporojets, C Squires, CL Squires 1999. An Escherichia coli strain with all chromosomal rRNA operons inactivated: complete exchange of rRNA genes between bacteria. Proc. Natl. Acad. Sci. U.S.A. 96(5):1971-6.
• Asai, T, C Condon, J Voulgaris, D Zaporojets, B Shen, M Al-Omar, C Squires, CL Squires 1999. Construction and initial characterization of Escherichia coli strains with few or no intact chromosomal rRNA operons. J. Bacteriol. 181(12):3803-9.