Shewanella oneidensis couples oxidation of lactate to respiration of many substrates. Here we report that llpR (L-lactate-positive regulator, SO_3460) encodes a positive regulator of L-lactate utilization distinct from previously studied regulators. We also demonstrate D-lactate inhibition of L-lactate utilization in S. oneidensis, resulting in preferential utilization of the D isomer.
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Brutinel et al. (2012) studied this question.
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