... glutathione, oxidizedform, cGCS, c-glutamylcysteine synthetase; DTNB, 5,5¢-dithiobis(2-nitrobenzoic acid); BSO, buthionine sulfoximine; BCNU, 1,3-bis[2-chlorethyl ]-1 -nitrosourea.Enzyme: glutathione ... YamagataUniversity School of Medicine, 2-2 -2 Iida-nishi, Yamagata City,Yamagata 99 0-9 585, Japan. Fax: + 81 23 628 5230,Tel.: + 81 23 628 5227, E-mail: jfujii@med.id.yamagata-u.ac.jpAbbreviations: GR, ... 5,5¢-Dithiobis(2-nitroben-zoic acid) (DTNB) was from Kanto Chemicals (Tokyo,Japan). 2-Vinylpyridine was from Wako Pure Chemicals(Osaka, J apan). Buthionine sulfoximine (BSO) and 1, 3- bis[2-chlorethyl ]-1 -nitrosourea...