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AbstractThe MoFe protein of nitrogenase is an 22 tetramer that contains two each of two different types of metal centers, the FeMo-cofactor and the P-clusters. The function of the P-clusters is believed to be to accept electrons from the Fe protein of nitrogenase and to donate them to the FeMo-cofactor. We have studied the P-clusters of Azotobacter vinelandii nitrogenase in both the PN and POX states...
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