Ribonucleotide Reductase Regulatory Subunit M2; Ribonucleotide Reductase M2 Polypeptide; Ribonucleotide Reductase Small Subunit; Ribonucleotide Reductase Small Chain; EC 1.17.4.1; RR2; Ribonucleoside-Diphosphate Reductase Subunit M2; RR2M; R2

This gene encodes one of two non-identical subunits for ribonucleotide reductase. This reductase catalyzes the formation of deoxyribonucleotides from ribonucleotides. Synthesis of the encoded protein (M2) is regulated in a cell-cycle dependent fashion. Transcription from this gene can initiate from alternative promoters, which results in two isoforms that differ in the lengths of their N-termini. Related pseudogenes have been identified on chromosomes 1 and X.