title: Spectroscopic properties of low-spin ferrous heme complexes and hemeproteins at 77degrees K.
mesh_terms: D000818:Animals; D003574:Cytochrome c Group; D003580:Cytochromes; D004926:Escherichia coli / Q000201:enzymology; D005615:Freezing; D006418:Heme; D006736:Horses; D008968:Molecular Conformation; D009206:Myocardium / Q000201:enzymology; D011487:Protein Conformation; D012247:Rhodospirillum rubrum / Q000201:enzymology; D013056:Spectrophotometry, Ultraviolet
chemical_list: D003574:Cytochrome c Group; D003580:Cytochromes; D006418:Heme