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Kinetic isotope effects on the rate-limiting step of heme oxygenase catalysis indicate concerted proton transfer/heme hydroxylation.
Davydov R, Matsui T, Fujii H, Ikeda-Saito M, Hoffman BM. Davydov R, et al. J Am Chem Soc. 2003 Dec 31;125(52):16208-9. doi: 10.1021/ja038923s. J Am Chem Soc. 2003. PMID: 14692760
We here report the cryoreduction/annealing experiments that directly measure solvent and secondary kinetic isotope effects (KIEs) of the rate-limiting R --> h conversion, using enzyme prepared with meso-deuterated heme and in H2O/D2O buffers to measure the solvent KIE ( …
We here report the cryoreduction/annealing experiments that directly measure solvent and secondary kinetic isotope effects (KIEs) of the rat …
Factors affecting hydrogen-tunneling contribution in hydroxylation reactions promoted by oxoiron(IV) porphyrin π-cation radical complexes.
Cong Z, Kinemuchi H, Kurahashi T, Fujii H. Cong Z, et al. Inorg Chem. 2014 Oct 6;53(19):10632-41. doi: 10.1021/ic501737j. Epub 2014 Sep 15. Inorg Chem. 2014. PMID: 25222493
These profiles are simulated using an equation derived from Bell's tunneling model. The temperature dependence of the KIE values (k(H)/k(D)) determined for these reactions indicates that the KIE value increases as the reaction temperature becomes lower, the bond dis …
These profiles are simulated using an equation derived from Bell's tunneling model. The temperature dependence of the KIE values (k(H …