locus-tag	class	description
B3_18	PF04679	ATP dependent DNA ligase C terminal region        
B3_18	PF01068	ATP dependent DNA ligase domain
B3_18	PF04675	DNA ligase N terminus
B3_20	PF01367	5'-3' exonuclease, C-terminal SAM fold
B3_20	PF02739	5'-3' exonuclease, N-terminal resolvase-like domain
B3_20	PF00476	DNA polymerase family A