##gff-version 3 B1L6X8 UniProtKB Propeptide 1 4 . . . ID=PRO_0000397324;Note=Removed in mature form%3B by autocatalysis;Ontology_term=ECO:0000255;evidence=ECO:0000255|HAMAP-Rule:MF_02113 B1L6X8 UniProtKB Chain 5 198 . . . ID=PRO_0000397325;Note=Proteasome subunit beta 2 B1L6X8 UniProtKB Active site 5 5 . . . Note=Nucleophile;Ontology_term=ECO:0000255;evidence=ECO:0000255|HAMAP-Rule:MF_02113