Methanosarcina barkeri MS and 227 and Methanosarcina mazei S-6 produced acetate when grown on H(2)-CO(2), methanol, or trimethylamine. Marked differences in acetate production by the two bacterial species were found, even though methane and cell yields were nearly the same. M. barkeri produced 30 to 75 mumol of acetate per mmol of CH(4) formed, but M. mazei produced only 8 to 9 mumol of acetate per mmol of CH(4).
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Westermann et al. (1989) studied this question.
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