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Kinetic studies of spin interconversion in ferric mixed‐spin derivatives of myoglobin
Author(s) -
Sano Takayuki,
Ishibashi Joji,
Ikeda Naoki,
Yasunaga Tatsuya,
Ogawa Satoshi,
Morishima Isao
Publication year - 1981
Publication title -
biopolymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.556
H-Index - 125
eISSN - 1097-0282
pISSN - 0006-3525
DOI - 10.1002/bip.1981.360200113
Subject(s) - chemistry , myoglobin , metmyoglobin , hemeprotein , cyanide , fluoride , hydroxide , azide , ferric , inorganic chemistry , cyanate , imidazole , reaction rate constant , photochemistry , computational chemistry , kinetics , heme , stereochemistry , organic chemistry , enzyme , physics , quantum mechanics
Kinetic studies of spin interconversion in various derivatives of metmyoglobin such as the fluoride, aquo, hydroxide, azide, imidazole, and cyanide were performed by the coaxial‐cable temperature‐jump method. For all these derivatives, except fluoride and aquomyoglobin, a single relaxation was observed around 3 μsec. The rate constants and activation parameters for the spin interconversion were estimated and are discussed in comparison with those reported for the reaction of synthetic iron complex. Other hemoproteins such as cytochrome c and human hemoglobin were also examined, and the results were compared with those for myoglobin. The effect of buffer solution is also discussed.