locus-tag	class	description
B3_18	COG1236	Exonuclease of the beta-lactamase fold involved in RNA processing
B3_18	COG1793	dna ligase
B3_20	COG0258	In addition to polymerase activity, this DNA polymerase exhibits 5'-3' exonuclease activity
B3_20	COG0749	In addition to polymerase activity, this DNA polymerase exhibits 5'-3' exonuclease activity