TABLE 3.

Biosynthesis of PHB by M. extorquens AM1 and mutants during growth on methanol and succinate

Strain	Carbon source	PHB (% [dry biomass wt])a
M. extorquens AM1	Succinate	18–20
M. extorquens AM1	Methanol	34–42
Mutantsb	Succinate	15–20
Mutantsb	Methanol	30–43
phaA mutant	Succinate	02
phaB mutant	Succinate	0
phaB mutant	Methanol	7–9
phaC mutant	Succinate	0
phaC suppressor mutant	Methanol	0

^aRange of three determinations. 0, Not detectable. 

^bOne depA mutant, one depB mutant, one croA mutant, and one hbd mutant.