# OC Root 2nd 3rd 4th PC Gene/Definition OC.187431 Archaea.93745 Thaumarchaeota.6992 Nitrososphaera.4791 nvn.2119 nvn:NVIE_022190 putative Type I restriction-modification system, specificity subunit S; K01154 type I restriction enzyme, S subunit [EC:3.1.21.3]