CGSC Strain#: 256
Strain Designation: AB256      Source of Strain: E.A. Adelberg
Sex: F' Episome/Plasmid: F3
   Plasmid Markers/Mutations:
Chromosomal Markers: galK2(Oc), xylA5, mtl-1, thiE1
Strain Comments:

• galK2(Oc)-- is a GAA(glu) to TAA(ochre) mutation, residue 134. Oller et al.1993. Apparently non-suppressible, since all revertants found were at the ochre site.
• galK2(Oc) was formerly called gal₂
• thiE1 was formerly called thi-1
• Oc = ochre(UAA) mutation

References:

• PITTARD, J, JS LOUTIT, EA ADELBERG 1963. GENE TRANSFER BY F' STRAINS OF ESCHERICHIA COLI K-12. I. DELAY IN INITIATION OF CHROMOSOME TRANSFER. J. Bacteriol. 85:1394-401.