TABLE 1.

Growth yields of M. chloromethanicum CM4 wild-type and mutants^a

CM4 strain	Growth yield (g [dry weight] mol of C−1)
	MeOH	MeOH-CH3Cl	CH3Cl
Wild type	10.0 ± 0.2	9.5 ± 0.2	10.6 ± 0.7
cmuA	9.7 ± 0.3	6.2 ± 0.2	NG
purU	9.9 ± 0.3	9.6 ± 0.2	NG
folD	8.9 ± 0.6	9.1 ± 0.2	11.3 ± 1.1

^aThe average of three independent cultures grown with either 20 mM methanol (MeOH), 20 mM methanol and 10 mM chloromethane (MeOH-CH₃Cl), or 10 mM chloromethane (CH₃Cl) is given. NG, no growth.