title: Do cytochromes function as oxygen sensors in the regulation of nitrate reductase biosynthesis?
abstract: The observation that oxygen represses nitrate reductase biosynthesis in a hemA mutant grown aerobically with or without delta-aminolevulinic acid indicates that cytochromes are not responsible for nitrate reductase repression in aerobically grown cells.
mesh_terms: D000332:Aerobiosis; D000622:Aminolevulinic Acid / Q000494:pharmacology; D003580:Cytochromes / Q000502:physiology*; D004926:Escherichia coli / Q000201:enzymology*; D009565:Nitrate Reductases / Q000096:biosynthesis*
chemical_list: D003580:Cytochromes; D000622:Aminolevulinic Acid; D009565:Nitrate Reductases