# OC Root 2nd 3rd 4th PC Gene/Definition OC.341020 Archaea.23904 Euryarchaeota.26100 Methanosphaera.485 mst.1299 mst:Msp_1394 partially conserved hypothetical membrane-spanning protein; K19665 archaetidylserine synthase [EC:2.7.8.38] OC.341020 Archaea.23904 Euryarchaeota.26100 Methanosphaera.485 metb.1506 metb:AW729_08535 hypothetical protein; K19665 archaetidylserine synthase [EC:2.7.8.38]