locus-tag	class	description
P1_23	PF01367	5'-3' exonuclease, C-terminal SAM fold
P1_23	PF02739	5'-3' exonuclease, N-terminal resolvase-like domain
P1_23	PF00476	DNA polymerase family A
P1_23	PF09281	Taq polymerase, exonuclease