Abstract

Abstract During utilization of compounds containing methyl groups, the non-methylotrophic bacteria Rhodococcus erythropolis oxidized the methyl groups entirely to carbon dioxide. This oxidation was linked to the presence of an NAD-dependent formaldehyde dehydrogenase activity which was lost on dialysis. The activity could be restored by the addition of boiled extract but not by adding the known cofactors glutathione or tetrahydrofolate. A further dehydrogenase activity with formaldehyde as substrate was found in ethanolgrown cells. This activity could be differentiated from that in methyl group metabolizing cells.

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