TABLE 2

The viability of E. coli strains carrying point mutations or deletions of recA, recBCD, and/or recF genes

StrainRelevant genotypeViabilitya
Point mutants
AB1157Rec+b100.0 ± 2.8
JC2926recA1347.6 ± 3.8
JC5519recB21 recC2227.7 ± 1.9
JC5547recA13 recB21 recC2218.0 ± 1.7
Deletions
AB1157Rec+b93.8 ± 4.7
JC10287ΔrecA30446.0 ± 2.4
JB1ΔrecBCD27.8 ± 2.3
AM1ΔrecA304 ΔrecBCD18.8 ± 1.9
AM3ΔrecF70.8 ± 5.2
AM4ΔrecA304 ΔrecF45.6 ± 4.0
AM5ΔrecBCD ΔrecF29.6 ± 7.9
  • a Viability is expressed as mean ± standard error. The number of independent measurements, done on different days, is between 8 and 20.

  • b Both strains are AB1157, but the data were collected at different times and treated separately.