locus-tag	class	description
B1_20	COG1236	Exonuclease of the beta-lactamase fold involved in RNA processing
B1_20	COG1793	dna ligase
B1_22	COG0258	In addition to polymerase activity, this DNA polymerase exhibits 5'-3' exonuclease activity
B1_22	COG0749	In addition to polymerase activity, this DNA polymerase exhibits 5'-3' exonuclease activity