@article{mbs:/content/journal/micro/10.1099/00221287-129-7-1983, author = "Scott, Robert I. and Edwards, Steven W. and Chance, Britton and Lloyd, David", title = "Terminal Oxidase of Crithidia fasciculata. Reactions with Carbon Monoxide and Oxygen at Subzero Temperatures and Photochemical Action Spectra", journal= "Microbiology", year = "1983", volume = "129", number = "7", pages = "1983-1989", doi = "https://doi.org/10.1099/00221287-129-7-1983", url = "https://www.microbiologyresearch.org/content/journal/micro/10.1099/00221287-129-7-1983", publisher = "Microbiology Society", issn = "1465-2080", type = "Journal Article", abstract = "Room temperature CO-difference spectra of whole cells ofCrithidia fasciculata show two CO-reactinghaemoproteins. The reaction of cytochrome a/a 3 with CO is complete within 1 min of bubbling with CO; that of cytochrome b takes longer than 40 min. A non-photodissociable O2-containing compound of cytochrome a/a 3 was formed in whole cell suspensions at −112 °C after photolysis of CO in the presence of 200 μm-O2. No O2-cytochrome b compound was observed under these conditions. Photochemical action spectra for the relief of CO-inhibited respiration, obtained at different O2 tensions, indicate cytochrome a/a 3 to be the major haemoprotein terminal oxidase; no evidence for a b-type cytochrome oxidase has been found.", }