Table 2. Similarity, identity, and coverage of select hydrogenase proteins comparing the Rubrivivax gelatinosus CBS sensor and uptake hydrogenases to other bacterial species including Ralstonia eutropha H16.

		Similarity%	Identity%	Coverage%
Sensor Hydrogenase
HupU	Rx. gelatinosus IL144	99	98	100
	R. eutropha H16 (HoxB)	84	74	98
HupV	Rx. gelatinosus IL144	99	98	100
	R. eutropha H16 (HoxC)	75	66	100
Uptake Hydrogenase
HupA	Rx. gelatinosus IL144	100	100	100
	R. eutropha H16 (HoxK)	96	89	87
HupB	Rx. gelatinosus IL144	99	99	100
	R. eutropha H16 (HoxG)	92	86	100

HupUV is a sensor hydrogenase, with HupU being the small subunit and HupV being the large, catalytic subunit. HupAB comprises a membrane-bound uptake hydrogenase with a small HupA subunit and a large, catalytic HupB subunit. Analysis was done using a NCBI P-BLAST search.