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Báo cáo khoa học: Probing the access of protons to the K pathway in the Paracoccus denitrificans cytochrome c oxidase

Chia sẻ: Nguyen Thang | Ngày: | Loại File: PDF | Số trang:9

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In recent studies on heme-copper oxidases a particular glutamate residue in subunit II has been suggested to constitute the entry point of the so-called K pathway. In contrast, mutations of this residue (E78 II ) in the Paracoccus denitrificanscytochromecoxidase do not affect its catalytic activity at all (E78 II Q) or reduce it to about 50% (E78 II A); in the latter case, the mutation causes no drastic decrease in hemea3 reduction kinetics under anaerobic con-ditions, when compared to typical K pathway mutants....

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Nội dung Text: Báo cáo khoa học: Probing the access of protons to the K pathway in the Paracoccus denitrificans cytochrome c oxidase

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