Table 3.

Comparison of aerobic reversion rate versus anaerobic reversion rate

Strain	Reversion rate, ×10−6		Anaerobic suppression	Mutation
	Aerobic	Anaerobic
YMH57/msh2	0.31	0.025	12	T → C
YMH57/msh6	0.33	0.0099	33
YMH52/msh2	1.7	0.038	45	C → T
YMH52/msh6	1.5	0.051	29
YMH54/msh2	5.6	0.12	47	G → T
YMH54/msh6	6.3	0.10	63

Anaerobic suppression is the ratio of aerobic to anaerobic reversion rates. The mutation shown is the one most likely to occur due to oxidative damage (e.g., G → T rather than C → A).