locus-tag	class	description
Q21_gp10	PF01844	HNH endonuclease
Q21_gp48	PF01380	SIS domain
Q21_gp6	PF03477	ATP cone domain
Q21_gp6	PF02867	Ribonucleotide reductase, barrel domain
Q21_gp6	PF00317	Ribonucleotide reductase, all-alpha domain
Q21_gp61	PF02511	Thymidylate synthase complementing protein
Q21_gp67	PF07733	Bacterial DNA polymerase III alpha NTPase domain
Q21_gp67	PF17657	Bacterial DNA polymerase III alpha subunit finger domain
Q21_gp67	PF14579	Helix-hairpin-helix motif
Q21_gp67	PF02811	PHP domain
Q21_gp67	PF00929	Exonuclease
Q21_gp7	PF00268	Ribonucleotide reductase, small chain