# OC Root 2nd 3rd 4th PC Gene/Definition OC.187392 Archaea.73309 Euryarchaeota.58527 Methanosarcina.10675 mls.1373 mls:MSLAZ_1386 Type I restriction-modification system, specificity subunit S; K01154 type I restriction enzyme, S subunit [EC:3.1.21.3]