# OC Root 2nd 3rd 4th 5th PC Gene/Definition OC.187445 Archaea.34246 Euryarchaeota.50902 Methanococcus.2404 Methanococcus_maripaludis.2268 mmz.27 mmz:MmarC7_0016 restriction modification system DNA specificity domain; K01154 type I restriction enzyme, S subunit [EC:3.1.21.3] OC.187445 Archaea.34246 Thaumarchaeota.6589 Nitrososphaera.4294 - nga.2695 nga:Ngar_c29140 putative restriction modification system DNA specificity domain protein; K01154 type I restriction enzyme, S subunit [EC:3.1.21.3]