Abstract
Enzymes of the Embden-Meyerhof-Parnas pathway and hexose monophosphate shunt were examined in cytoplasmic extracts of three serovars of Ureaplasma urealyticum. We found no glucose-6-phosphate or 6-phosphogluconate dehydrogenase, hexokinase, phosphoglucose isomerase, aldolase, or lactic dehydrogenase activities. We failed to find cytochrome pigments in extracts and found no significant production of 14CO2 from [U-14C]glucose, nor did we find oxygen-dependent reduced nicotinamide adenine dinucleotide oxidase activity. Lactic acid was found only at trace levels in spent culture fluids. Ureaplasmas are apparently nonfermentative and are unlike all other mollicutes in that they have no detectable oxygen-dependent reduced nicotinamide adenine dinucleotide oxidase activity.
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