TABLE 2.

Number of colonies screened for fdh deletions

Strain genotype	No. of colonies tested	No. of mutants detected	Mutant vs WT ratio
ΔfdhA1	40	5	0.13
ΔfdhA2	54	0	NA
ΔfdhA3	14	7	0.50
ΔfdhA1 ΔfdhA3	40	6	0.15