##gff-version 3 Q09444 UniProtKB Chain 1 321 . . . ID=PRO_0000211071;Note=Ubiquitin carboxyl-terminal hydrolase ubh-4 Q09444 UniProtKB Active site 83 83 . . . Note=Nucleophile;Ontology_term=ECO:0000250;evidence=ECO:0000250|UniProtKB:P09936 Q09444 UniProtKB Active site 158 158 . . . Note=Proton donor;Ontology_term=ECO:0000250;evidence=ECO:0000250|UniProtKB:P09936 Q09444 UniProtKB Site 173 173 . . . Note=Important for enzyme activity;Ontology_term=ECO:0000250;evidence=ECO:0000250|UniProtKB:P09936