1L6X:
reference: Mapping of the C1q binding site on rituxan, a chimeric antibody with a human IgG1 Fc., Idusogie EE, Presta LG, Gazzano-Santoro H, Totpal K, Wong PY, Ultsch M, Meng YG, Mulkerrin MG, J Immunol 2000 Apr 15;164(8):4178-84. PMID: 10754313

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