TABLE 3.

Generation times for P. butanovora mutants grown on butane, propane, and ethane^a

P. butanovora strain	Generation time (h ± SD) in growth substrate:
	Butane	Propane	Ethane
Rev WT	3.6 ± 0.2	4.0 ± 0.4	4.5 ± 0.3
T148C	4.4 ± 0.3	4.2 ± 0.4	7.0 ± 0.1
Q320K	4.1 ± 0.3	3.9 ± 0.1	5.9 ± 0.1
F321Y	3.4 ± 0.3	3.4 ± 0.2	3.8 ± 0.1
L279F	5.7 ± 0.1	4.5 ± 0.1	7.9 ± 0.6
G113N	9.1 ± 0.4	NAb	13.1 ± 0.5

^aGeneration times were determined based on exponential increases in optical density of three replicate growth curves.

^bNA, not applicable.