Light-dependent inhibition of protein kinase C and superoxide generation of neutrophils by hypericin, an antiretroviral agent. - Utsumi,T.; Okuma,M.; Utsumi,T.; Kanno,T.; Yasuda,T.; Kobuchi,H.; Horton,A.A.; Utsumi,K. (Archives of Biochemistry & Biophysics, 1995)