# OC Root 2nd 3rd 4th PC Gene/Definition OC.187465 Archaea.66416 Euryarchaeota.51468 Methanoculleus.2497 mbg.1043 mbg:BN140_1099 hsdS3; type I restriction enzyme, S subunit; K01154 type I restriction enzyme, S subunit [EC:3.1.21.3]