. . . . . . . . . . . . . . . . . . . . . . "rir4_yeast"^^ . "Ribonucleotide reductase R2 subunit 2"^^ . "RNR4"^^ . "Ribonucleotide reductase small subunit 2"^^ . "CRT3"^^ . "YGR180C"^^ . . . . "Ribonucleoside-diphosphate reductase small chain 2"^^ .