1GKG:
reference: Structure of the C3b binding site of CR1 (CD35), the immune adherence receptor., Smith BO, Mallin RL, Krych-Goldberg M, Wang X, Hauhart RE, Bromek K, Uhrin D, Atkinson JP, Barlow PN, Cell 2002 Mar 22;108(6):769-80. PMID: 11955431

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