参考文献:
Noelle RJ, et al. A 39-kDa protein on activated helper T cells binds CD40 and transduces the signal for cognate activation of B cells. Proc. Natl. Acad. Sci. USA 89: 6550-6554, 1992. PubMed: 1378631
Roy M, et al. The regulation of the expression of gp39, the CD40 ligand, on normal and cloned CD4+ T cells. J. Immunol. 151:
2497-2510, 1993. PubMed: 8103067