CGSC Strain#: 4808
Strain Designation: MA108      Source of Strain: W.K. Maas
Other Designations: PA260 R9
Sex: F- Chromosomal Markers: argF45, lacY1 or lacZ4 or lac-44, tsx-73, glnX44(AS), gal-6, hisG1, serA25, rpsL133(strR), malT1(λ^R), xyl-7, thiE1, argI44
Strain Comments:

• The 84 -5' region comes from E. coli B (Gorini B90H).
• glnX44(AS)-- Mutation is a C to T transition at nucleotide 34 (3rd position of the anticodon)
• hisG1-- This mutation has been reported as either a frameshift or a 36 nt deletion
• glnX44(AS) was formerly called su⁺_II
• glnX44(AS) was formerly called supE44
• glnX44(AS) was formerly called glnV44
• thiE1 was formerly called thi-1
• xyl-7 was formerly called xylA7
• AS = amber(UAG) suppressor
• LamR = Lambda-resistant
• strR = streptomycin resist.

References:

• MAAS, R, WK MAAS 1962. Introduction of a gene from Escherichia coli B into HFR and F-strains of Escherichia coli K-12. Proc. Natl. Acad. Sci. U.S.A. 48:1887-93.
• Jacoby, GA 1971. Mapping the gene determining ornithine transcarbamylase and its operator in Escherichia coli B. J. Bacteriol. 108(2):645-51.