locus-tag	class	description
smaasur_19	PF01367	5'-3' exonuclease, C-terminal SAM fold
smaasur_19	PF02739	5'-3' exonuclease, N-terminal resolvase-like domain
smaasur_19	PF00476	DNA polymerase family A
smaasur_19	PF09281	Taq polymerase, exonuclease