1Q5R:
reference: Crystal structures of the Rhodococcus proteasome with and without its pro-peptides: implications for the role of the pro-peptide in proteasome assembly., Kwon YD, Nagy I, Adams PD, Baumeister W, Jap BK, J Mol Biol 2004 Jan 2;335(1):233-45. PMID: 14659753

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