Iron proteins nucleotides, interaction with

Subunit B1 of . coli ribonucleotide reductase is an SH protein carrying several binding sites of different affinity for substrate and effector nucleotides these interactions will be discussed in a later paragraph. The most unusual features of the smaller subunit B 2 are its iron content and a tyrosine residue present as stable free radical. Both these components are essential for enzyme catalysis and structurally coupled. They confer characteristic light absorption to the protein, with a broad maximum around 370 nm (a =... 

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