Nitrous-oxide reductase is part of a bacterial respiratory system which is activated under anaerobic conditions in the presence of nitrate or nitrous oxide. MSDKQTDKDEKTGLSRRGFLGASALTRSAVAASGLVGGVMTRDSWAAAAKEAQQKIHVAPGELDEYYGFWSGGHQGEVRVLGVPSMRELMRIPVFNVDSATGWGLTNESRHILGDTAKFLNGDCHHPHISMTDGKYDGKYLFINDKANSRVARIRLDIMKCDKITTIPNVQAIHGLRLQKVPHTKYVFCNAEFIIPHPNDGKVFDLEDENSFTMYNAVDAETMEVAFQVIVDGNLDNTDADYTGRFTAATCYNSEKAFDLGGMMRNERDWVVVFDISAVEKEIKAGRFITLGDSKVPVVDGRKKDGKDSVVTRYIPVPKNPHGLNTSTDGKYFIANGKLSPTCSMIAIDLLPDLFAGKLKDPRDVVVGEPELGLGPLHTTFDGRGNAYTTLFIDSQVVKWNMEEARRAYKGEKVNYIKQKLDVHYQPGHLHASLCETSEADGKWLVALSKFSKDRFLPTGPLHPENDQLIDISGDVMKLVHDGPTFAEPHDCIMARRDQIKTRKIWDRNDPFFAPTVAMAKKDGINLEEDNKVIRDGNKVRVYMTSMAPAYGLTEFKVKQGNEVTVVITNMDQIEDVSHGFVMVNHGVSMEISPQQTSSITFIADKPGLHWYYCSWFCHALHMEMVGRMMVEPA N(2)OR Nitrous-oxide reductase N2O reductase 634 NOSZ2_PSEAE nosZ