# OC Root 2nd 3rd 4th PC Gene/Definition OC.187672 Bacteria.185144 Proteobacteria.73005 Gammaproteobacteria.466375 wma.2019 wma:WM2015_2858 Type I restriction-modification system specificity subunit; K01154 type I restriction enzyme, S subunit [EC:3.1.21.3]