1887

Abstract

whole cells showed high rates of oxygen uptake with -serine and -proline as respiratory substrates, and somewhat lower rates with -alanine and -proline. These respiratory activities were inhibited by rotenone and antimycin A at low concentrations. Since pyruvate was produced from -serine and - and -alanine in whole cells, the respiratory activities with these amino acids as substrates occurred via pyruvate. Whole cells showed 2,6-dichlorophenolindophenol (DCIP)-reducing activities with - and -proline and -alanine as substrates, suggesting that hydrogen removed from these amino acids also participated in oxygen uptake by the whole cells. High amounts of -proline, - and -alanine, and -serine were present in cells, and these amino acids also predominated in samples of human gastric juice. seems to utilize - and -proline, -alanine and -serine as important energy sources in its habitat of the mucous layer of the stomach.

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2003-08-01
2020-10-31
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