CGSC Strain#: 5286
Strain Designation: M6      Source of Strain: A. Markovitz
Sex: Hfr    Point of Origin#: 1   Map Position: 96.80   Direction of Marker Transfer: Clockwise
Chromosomal Markers: lacI22, lon-10, λ^-, e14-, relA1, spoT1, thiE1
Strain Comments:

• This strain is mucoid.
• 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.
• lacI22 was formerly called lac_i3^-
• lacI22 was formerly called lacI3
• thiE1 was formerly called thi-1

References:

• Markovitz, A. 1964. Regulatory mechanism for synthesis of capsular polysaccharide in mucoid mutants of Escherichia coli K-12. Proc.Natl.Acad.Sci.USA 51:239-240
• Markovitz, A., N. Rosenbaum 1965. A regulator gene that is dominant on an episome and recessive on a chromosome. Proc.Natl.Acad.Sci.USA 54:1084-1091
• Donachie, WD, KJ Begg, M Vicente 1976. Cell length, cell growth and cell division. Nature 264(5584):328-33.