1WUI:
reference: Activation process of [NiFe] hydrogenase elucidated by high-resolution X-Ray analyses: conversion of the ready to the unready state., Ogata H, Hirota S, Nakahara A, Komori H, Shibata N, Kato T, Kano K, Higuchi Y, Structure. 2005 Nov;13(11):1635-42. PMID: 16271886

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