locus-tag	class	description
PE21_gp20	IPR000977	DNA ligase, ATP-dependent
PE21_gp20	IPR012309	DNA ligase, ATP-dependent, C-terminal
PE21_gp20	IPR012310	DNA ligase, ATP-dependent, central
PE21_gp20	IPR016059	DNA ligase, ATP-dependent, conserved site
PE21_gp20	IPR012308	DNA ligase, ATP-dependent, N-terminal
PE21_gp20	IPR036599	DNA ligase, ATP-dependent, N-terminal domain superfamily
PE21_gp20	IPR012340	Nucleic acid-binding, OB-fold
PE21_gp20	IPR036866	Ribonuclease Z/Hydroxyacylglutathione hydrolase-like
PE21_gp22	IPR015361	Taq polymerase, thermostable, exonuclease region
PE21_gp22	IPR036397	Ribonuclease H superfamily
PE21_gp22	IPR012337	Ribonuclease H-like superfamily
PE21_gp22	IPR029060	PIN-like domain superfamily
PE21_gp22	IPR008918	Helix-hairpin-helix motif, class 2
PE21_gp22	IPR002298	DNA polymerase A
PE21_gp22	IPR001098	DNA-directed DNA polymerase, family A, palm domain
PE21_gp22	IPR020045	DNA polymerase I-like, H3TH domain
PE21_gp22	IPR019760	DNA-directed DNA polymerase, family A, conserved site
PE21_gp22	IPR036279	5'-3' exonuclease, C-terminal domain superfamily
PE21_gp22	IPR002421	5'-3' exonuclease, N-terminal
PE21_gp22	IPR020046	5'-3' exonuclease, alpha-helical arch, N-terminal
PE21_gp22	IPR018320	DNA polymerase 1
PE21_gp28	IPR002646	Poly A polymerase, head domain
PE21_gp28	IPR032810	CCA-adding enzyme, C-terminal
PE21_gp28	IPR023068	CCA-adding enzyme, firmicutes
PE21_gp28	IPR032828	tRNA nucleotidyltransferase/poly(A) polymerase, RNA and SrmB- binding domain