##gff-version 3 C4KHB0 UniProtKB Propeptide 1 17 . . . ID=PRO_0000397442;Note=Removed in mature form%3B by autocatalysis;Ontology_term=ECO:0000255;evidence=ECO:0000255|HAMAP-Rule:MF_02113 C4KHB0 UniProtKB Chain 18 211 . . . ID=PRO_0000397443;Note=Proteasome subunit beta 1 C4KHB0 UniProtKB Active site 18 18 . . . Note=Nucleophile;Ontology_term=ECO:0000255;evidence=ECO:0000255|HAMAP-Rule:MF_02113