##gff-version 3 P87037 UniProtKB Signal peptide 1 19 . . . Ontology_term=ECO:0000255;evidence=ECO:0000255 P87037 UniProtKB Chain 20 221 . . . ID=PRO_0000393169;Note=Probable endo-1%2C4-beta-xylanase B P87037 UniProtKB Domain 33 221 . . . Note=GH11;Ontology_term=ECO:0000255;evidence=ECO:0000255|PROSITE-ProRule:PRU01097 P87037 UniProtKB Active site 117 117 . . . Note=Nucleophile;Ontology_term=ECO:0000255;evidence=ECO:0000255|PROSITE-ProRule:PRU10062 P87037 UniProtKB Active site 208 208 . . . Note=Proton donor;Ontology_term=ECO:0000250;evidence=ECO:0000250