3ICH:
reference: Structural basis of cyclophilin B binding by the calnexin/calreticulin P-domain., Kozlov G, Bastos-Aristizabal S, Maattanen P, Rosenauer A, Zheng F, Killikelly A, Trempe JF, Thomas DY, Gehring K, J Biol Chem. 2010 Sep 3. PMID: 20801878

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