Article
CO binding studies of engineered cytochrome P-450ds: effects of mutations at putative distal sites in the presence of polycyclic hydrocarbons.
Biochemistry - 14 May 1991
Shimizu T, Ito O, Hatano M, Fujii-Kuriyama Y
Abstract excerpt
The kinetic parameters of CO binding to genetically engineered cytochrome P-450d (P-450d) and two putative distal mutants, Glu318Asp and Thr322Ala, have been evaluated in the presence and absence of polycyclic hydrocarbons. The dissociation constant (Kd) of CO from wild-type P-450d was decreased by half (from 1.8 microM to approximately 0.9 microM) in the presence of phenanthrene or anthracene but was increased...
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