CGSC Strain#: 4549
Strain Designation: AT999      Source of Strain: A.L. Taylor
Sex: Hfr    Point of Origin#: 45   Map Position: 65.00   Direction of Marker Transfer: Counterclockwise
Chromosomal Markers: dapB17::Mu, λ^-, e14-, relA1, spoT1, thiE1
Strain Comments:

• This strain can be maintained on the standard rich media only if 40-50 ug/ml DL-diaminopimelic acid is added to the medium. The strain may carry a temperature-sensitive mutation.
• dapB17::Mu-- is due to the integration of phage Mu at the dapB locus.
• e14--- : Loss of the e14 element makes the strain McrA^-.
• spoT1-- In addition to the 6bp insertion, there is a C to T transition resulting in an H257Y substitution.
• thiE1 was formerly called thi-1

References:

• Bukhari, A.I., A.L. Taylor 1971. Genetic analysis of diaminopimelic acid- and lysine-requiring mutants of Escherichia coli. J.Bacteriol. 105:844-854