# OC Root	2nd	3rd	4th	PC	Gene/Definition
OC.277588	Archaea.64195	Euryarchaeota.49184	Methanocella.2148	mpd.2081	mpd:MCP_2152   putative K+-dependent Na+/Ca+ exchanger protein; K07301 cation:H+ antiporter
OC.277588	Archaea.64195	Euryarchaeota.49184	Methanocella.2148	rci.1594	rci:RCIX2235   putative Na(+)/Ca(2+) antiporter; K07301 cation:H+ antiporter