期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：1974
卷号：71
期号：11
页码：4303-4306
DOI：10.1073/pnas.71.11.4303
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：Nuclear magnetic resonance spectra of ferro- and ferricytochrome C2 from the facultative photoheterotroph, Rhodospirillum rubrum, obtained with a 220-MHz spectrometer, are presented. Assignments to protons of various important structural groups in contact with or near the prosthetic heme group are given. These include (a) in the ferro-form, methyl, c{beta} and c{gamma} protons of the extraplanar ligand residue, methionine 91, and methyl protons of the residue leucine 32; and (b) corresponding protons in the ferri-form with the addition of methyl protons from the condensation of a heme vinyl group with cysteine 17, a single proton from the condensation involving cysteine 14, and protons from the ring methyls. These resonances are compared with those corresponding to the same groups in horse heart cytochrome c.
关键词：nuclear magnetic resonance assignments ; cytochromes c ; comparative structures
