locus-tag	class	description
SJC22_27	PF01367	5'-3' exonuclease, C-terminal SAM fold
SJC22_27	PF02739	5'-3' exonuclease, N-terminal resolvase-like domain
SJC22_27	PF00476	DNA polymerase family A
SJC22_27	PF09281	Taq polymerase, exonuclease