2QY0:
reference: Revisiting the mechanism of the autoactivation of the complement protease C1r in the C1 complex: Structure of the active catalytic region of C1r., Kardos J, Harmat V, Pallo A, Barabas O, Szilagyi K, Graf L, Naray-Szabo G, Goto Y, Zavodszky P, Gal P, Mol Immunol. 2007 Nov 8;. PMID: 17996945

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