# OC Root 2nd 3rd 4th PC Gene/Definition OC.187408 Archaea.58644 Euryarchaeota.43525 Halobacterium.4588 hdl.3200 hdl:HALDL1_16620 type I restriction endonuclease subunit S; K01154 type I restriction enzyme, S subunit [EC:3.1.21.3]