Bobst A M
Proc Natl Acad Sci U S A. 1971 Mar;68(3):541-3. doi: 10.1073/pnas.68.3.541.
Preliminary studies of the formation of cationic 2 - amino - 6, 7 - dimethyl - 4 - hydroxy - 5, 6, 7, 8 - tetrahydropteridine radicals in alcoholic solution are reported. The results indicate that the same type of radical is formed either by oxidizing agents like hydrogen peroxide and iodine, or in a photoinduced reaction with chlorophyll a. A similarity between the epr signal of the light-induced cationic pteridine radical and the photoinduced epr signal II in photosynthesis is observed.
报道了在酒精溶液中阳离子2-氨基-6,7-二甲基-4-羟基-5,6,7,8-四氢蝶啶自由基形成的初步研究。结果表明，通过过氧化氢和碘等氧化剂，或在与叶绿素a的光诱导反应中，均可形成相同类型的自由基。观察到光诱导阳离子蝶啶自由基的电子顺磁共振（EPR）信号与光合作用中的光诱导EPR信号II之间存在相似性。
