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Ribonucleotide reductase (RNR) catalyzes the formation of deoxyribonucleotides, a rate limiting step in DNA synthesis. Class I RNR is a tetramer that consists of two subunits, R1 and R2; enzymatic activity requires association of R1 with R2. The R2 subunit is of special interest because it dictates the interaction with R1 that is required for enzymatic activity expression, and it is expressed only...
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