##gff-version 3 Q9RFN0 UniProtKB Chain 1 668 . . . ID=PRO_0000407686;Note=Beta-galactosidase BgaB Q9RFN0 UniProtKB Active site 148 148 . . . Note=Proton donor;Ontology_term=ECO:0000250;evidence=ECO:0000250|UniProtKB:O69315 Q9RFN0 UniProtKB Active site 302 302 . . . Note=Nucleophile;Ontology_term=ECO:0000250;evidence=ECO:0000250|UniProtKB:O69315 Q9RFN0 UniProtKB Binding site 109 109 . . . Ontology_term=ECO:0000250;evidence=ECO:0000250|UniProtKB:O69315 Q9RFN0 UniProtKB Binding site 113 113 . . . Ontology_term=ECO:0000250;evidence=ECO:0000250|UniProtKB:O69315 Q9RFN0 UniProtKB Binding site 147 147 . . . Ontology_term=ECO:0000250;evidence=ECO:0000250|UniProtKB:O69315 Q9RFN0 UniProtKB Binding site 156 156 . . . Ontology_term=ECO:0000250;evidence=ECO:0000250|UniProtKB:O69315 Q9RFN0 UniProtKB Binding site 158 158 . . . Ontology_term=ECO:0000250;evidence=ECO:0000250|UniProtKB:O69315 Q9RFN0 UniProtKB Binding site 161 161 . . . Ontology_term=ECO:0000250;evidence=ECO:0000250|UniProtKB:O69315 Q9RFN0 UniProtKB Binding site 310 310 . . . Ontology_term=ECO:0000250;evidence=ECO:0000250|UniProtKB:O69315 Q9RFN0 UniProtKB Binding site 350 353 . . . Ontology_term=ECO:0000250;evidence=ECO:0000250|UniProtKB:O69315