Formation of Radical Cations of Dihydropteridine and Dihydroflavin in the Photoreduction of Pteridine and Flavin Analogues by Benzyl Alcohol Derivatives
作者:Shunichi Fukuzumi、Kumiko Tanii、Toshio Tanaka
DOI:10.1246/cl.1989.35
日期:1989.1
cations of dihydropteridine and dihydroflavin are formed in the photoreduction of pteridine and flavin analogues, respectively, by benzyl alcoholderivatives in the presence of perchloric acid in acetonitrile via photoinduced electron transfer from benzyl alcoholderivatives to the triplet excited states of protonated pteridine and flavin analogues. Their ESR spectra and the stabilities are compared.
The present invention provides a method of preparing apoenzyme of a riboflavin-dependent enzyme, comprising the steps of: growing COS-7 cells in a riboflavin-free medium; introducing a cDNA encoding a riboflavin-dependent enzyme; and expressing said cDNA. Also provided is a method of screening for an inhibitor of a flavin dependent enzyme, comprising the steps of; contracting a potential inhibitor of a flavin dependent enzyme with the cell line of claim 7 in the presence of riboflavin, FMN or Fad; and measuring the enzymatic activity of the flavin dependent enzyme.