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. 2000 Dec;182(24):6892–6899. doi: 10.1128/jb.182.24.6892-6899.2000

FIG. 2.

FIG. 2

Effect of the growth phase on MQO activity. E. coli MC4100 was grown in NMM using 0.5% (wt/vol) pyruvic acid as carbon source in a controlled batch under constant oxygen pressure. Membrane vesicles and cleared extracts were prepared from cells harvested at indicated positions. MQO and MDH were measured as described in the text.