9b5b is a 3 chain structure with sequence from Schizosaccharomyces pombe 972h-. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
UBC4_SCHPO Catalyzes the covalent attachment of ubiquitin to other proteins. Mediates the selective degradation of short-lived and abnormal proteins. Mediates ubiquitination of PEX5 (By similarity).