CD40 interacts directly with RAG1 and RAG2 in autoaggressive T cells and Fas prevents CD40-induced RAG expression.
Vaitaitis GM, Wagner DH. CD40 interacts directly with RAG1 and RAG2 in autoaggressive T cells and Fas prevents CD40-induced RAG expression. Cell Mol Immunol. 2013 Nov; 10(6):483-9.