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Alignment of primate CD40. Amino acid sequences from human (acc. no. AA043990.1), rhesus macaque (acc. no. MF498903), olive baboon (acc. no. NP_001306202.1), and common marmoset (acc. no. NP_001254659.1) CD40 ectodomains are shown. Disulfide linkages are bracketed and domain modules analyzed in Figure S1 are labeled A-F.
