locus-tag	class	description
TU18-21_00120	PF01367	5'-3' exonuclease, C-terminal SAM fold
TU18-21_00120	PF02739	5'-3' exonuclease, N-terminal resolvase-like domain
TU18-21_00135	PF01510	N-acetylmuramoyl-L-alanine amidase