TABLE 1.

ehb homologs in Methanothermobacter thermautotrophicus ΔH and Methanococcus maripaludis S2

Gene	Homolog		% aa identitya	Predicted gene product
	M. thermautotrophicus	M. maripaludis
ehbA	mth1251	mmp1469	57.7	Transmembrane protein
ehbB	mth1250	mmp1049	38.7	Transmembrane protein
ehbC	mth1249	mmp1073	46.7	Transmembrane protein
ehbD	mth1248	mmp1074	49.8	Transmembrane protein
ehbE	mth1247	mmp1629	52.0	Transmembrane protein
ehbF	mth1246	mmp1628	49.1	Transmembrane protein, ion translocator
ehbG	mth1245	mmp1627	41.6	Transmembrane protein
ehbH	mth1244	mmp1626b	38.5	Transmembrane protein
ehbI	mth1243	mmp1626	38.5	Transmembrane protein
ehbJ	mth1242	mmp1625	38.9	Transmembrane protein
ehbK	mth1241	mmp1624	47.4	Polyferredoxin
ehbL	mth1240	mmp1623	49.6	Ferredoxin
ehbM	mth1239	mmp1622	61.8	Hydrogenase small subunit
ehbN	mth1238	mmp1153	52.1	Hydrogenase large subunit
ehbO	mth1237	mmp1621	50.0	Transmembrane protein
ehbP	mth1236	mmp0940	46.6	Hydrophilic protein
ehbQ	mth1235	mmp0400	57.1	Hydrophilic protein

^aPercent amino acid (aa) sequence identity.

^bmmp1626 is a gene fusion of mth1244 and mth1243.