1C3D: X-Ray Crystal Structure Of C3d: A C3 Fragment And Ligand For Complement Receptor 2
reference: X-ray crystal structure of C3d: a C3 fragment and ligand for complement receptor 2., Nagar B, Jones RG, Diefenbach RJ, Isenman DE, Rini JM, Science 1998 May 22;280(5367):1277-81. PMID: 9596584

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