4. Cytokine receptor, CKR 儿L-1R、儿L-2R、‖L-4R、L5R、lL-6R、 儿L-7R, IFN-VR A regulate the activation, differentiation and function of B cells4．Cytokine receptor, CKR IL-1R、IL-2R、IL-4R、IL-5R、IL-6R、 IL-7R, IFN-γR regulate the activation, differentiation and function of B cells