CGSC Strain#: 5711
Strain Designation: K12S      Source of Strain: Pasteur Institute
Sex: F+ Chromosomal Markers: λ^-, serU84(AS), fhuA27 or fhuA24
Strain Comments:

• Note that the designation "K12S" may have been used in the past to refer to other LAM^S strains.
• This version of K12S may contain a phage and may carry supE44, lacY40, and galT22, see CGSC 5743 for a phage free version.
• serU84(AS) was formerly called supD84
• AS = amber(UAG) suppressor

References:

• Bachmann, BJ 1972. Pedigrees of some mutant strains of Escherichia coli K-12. Bacteriol.Rev. 36(4):525-57.