CGSC Strain#: 7187
Strain Designation: EM1900      Source of Strain: E. McFall
Sex: F- Chromosomal Markers: fhuA24, lacY40, lac, galK8, dsdC9, metB1
Strain Comments:

• lacY40-- When lacY40 and lac ? appear in a genotype, it is meant to indicate that lacY40 has become more stable due to a second mutation, perhaps in lac occurring in W3828.

References:

• McFall, E 1967. Dominance studies with stable merodiploids in the D-serine deaminase system of Escherichia coli K-12. J. Bacteriol. 94(6):1982-8.
• McFall, E 1967. Mapping of the d-serine deaminase region in Escherichia coli K-12. Genetics 55(1):91-9.
• Cosloy, SD 1973. D-serine transport system in Escherichia coli K-12. J. Bacteriol. 114(2):679-84.