ENERGY SOURCES UTILIZED BY VIBRIO FETUS

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Abstract
Lactate, pyruvate, acetate, [alpha]-ketoglutarate, succinate, malate, fumarate, aspartate, asparagine, glutamate, and proline all serve as suitable energy sources for V. fetus. Glucose, hexosediphosphate, glycerol, glycerophosphate, oxalacetate, citrate, isocitrate, oxalo-succinate, tartrate, glycine, alanine, threonine, cysteine, methionine, histidine, phenylalanine, leucine, lysine, ornithine, and arginine do not support appreciable growth. Resting cell suspensions oxidize lactate, pyruvate, isocitrate, and fumarate. Hexosediphosphate may be oxidized slightly. Glucose and glycerophosphate are not oxidized. It appears that V. fetus utilizes only intermediates of the tricarboxylic acid cycle or compounds which can easily be introduced into this cycle. Apparently this organism obtains its energy only by aerobic respiration.