locus-tag	class	description
TU18-20_00115	PF01367	5'-3' exonuclease, C-terminal SAM fold
TU18-20_00115	PF02739	5'-3' exonuclease, N-terminal resolvase-like domain
TU18-20_00130	PF01510	N-acetylmuramoyl-L-alanine amidase