[1] Noonan FP,ek al,Cis.T,Tracanic acid,a product formatted by Ultravioler B irradiation of the skin,initiates an antigen-Presentation defect in splenic dendritie.cells in vivo.J Invest Derrnatol,90: 92.
[2] Rod JA.et al.Ultrxviolet-irradiatted urocanic acid suppresses delayed-type lypcrsensitivity to herpes Simplex virus in rice.J Invest Dermatol.1986.87: 630.