1.1.5.3	glycerol-3-phosphate dehydrogenase	nitrate reduction X (dissimilatory, periplasmic)	
1.9.6.1	nitrate reductase (cytochrome)	nitrate reduction X (dissimilatory, periplasmic)	
7.1.1.8	quinol-cytochrome-c reductase	nitrate reduction X (dissimilatory, periplasmic)