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Brief Communication

Nature Chemical Biology 5, 94–96 (1 February 2009) | doi:10.1038/nchembio.135

Cytochrome bd confers nitric oxide resistance to Escherichia coli

Maria G Mason , Mark Shepherd , Peter Nicholls , Paul S Dobbin , Kathryn S Dodsworth , Robert K Poole & Chris E Cooper

The aerobic respiratory chain of Escherichia coli has two terminal quinol oxidases: cytochrome bo and cytochrome bd. Cytochrome bd was thought to function solely to facilitate micro-aerobic respiration.