[文献書誌] NAKANISHI,Nobuo: "Long-term treatment of PC12 phechromocytoma with dibutyryl cyclic AMP increases biopterin content in the cell but decreases that in the medium.(In:Chemistry and Biology of Pteridines and Folates,pp.231-234.)" Plenum Press,New York(Ayling,J.E.,Nair,M.G.,& Baugh,C.M.,ede.), 4 (1993)