title: Nitrate, but not silver, ions induce spectral changes in Escherichia coli cytochrome d.
abstract: The absorbance maximum (630 nm) of reduced cytochrome d in Escherichia coli membrane particles was diminished by 160 microM AgNO3 or NaNO3 and accompanied by the formation of a species with an absorption maximum at 640-645 nm. Nitrite, trioxodinitrate and nitric oxide elicited qualitatively similar, but faster, changes in the spectrum of cytochrome d, suggesting that formation of a nitrosyl complex may be involved in all cases. In direct contrast to an earlier report, silver ions (160 microM) were without effect on the alpha-bands of reduced cytochromes d, b or a 1.
mesh_terms: D017937:Cytochrome d Group; D003580:Cytochromes / Q000378:metabolism*; D004926:Escherichia coli / Q000187:drug effects / Q000201:enzymology*; D009589:Nitrogen Oxides / Q000494:pharmacology; D012835:Silver Nitrate / Q000494:pharmacology*; D013053:Spectrophotometry
chemical_list: D003580:Cytochromes; D009589:Nitrogen Oxides; C031701:nitrogen trioxide; D017937:Cytochrome d Group; D012835:Silver Nitrate