Nitrogenase conformational protection

Because nitrogenase proteins are oxygen-sensitive (Section I,A,2), mechanisms must exist to either exclude O2 from the vicinity of the enzyme or, alternatively, make the susceptible sites 02-tolerant (Dalton and Postgate, 1969a). Both these mechanisms do exist although the latter (conformational protection) has only been shown in Azotobacter. These mechanisms have been discussed exhaustively in earlier reviews (Postgate, 1971, 1974 Yates... 

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