1QSC:
reference: Crystallographic analysis of CD40 recognition and signaling by human TRAF2., McWhirter SM, Pullen SS, Holton JM, Crute JJ, Kehry MR, Alber T, Proc Natl Acad Sci U S A 1999 Jul 20;96(15):8408-13. PMID: 10411888

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