# OC Root	2nd	3rd	4th	PC	Gene/Definition
OC.508783	Archaea.28942	Euryarchaeota.32720	Methanosaeta.346	mtp.155	mtp:Mthe_0139   nitrogen-fixing NifU domain protein
OC.508783	Archaea.28942	Euryarchaeota.32720	Methanosaeta.346	mcj.1363	mcj:MCON_1726   NifU-like domain protein
OC.508783	Archaea.28942	Euryarchaeota.32720	Methanosaeta.346	mhi.2170	mhi:Mhar_2316   Nitrogen-fixing NifU domain protein