Search results for "Thioglycolic acid"
showing 2 items of 2 documents
Properties and amino acid composition of pure epoxide hydratase
1975
1. Introduction Rat liver epoxide hydratase [EC 4.2.1.631 which catalyses the conversion of epoxides to trurans-dihydro- diols has been purified to apparent homogeneity as determined by three independent criteria [l] . The preparation obtained was capable of catalysing the hydration of both styrene oxide and the 4,5- (K- region)epoxide of benzo(a)pyrene [ 11. Epoxides of polycyclic hydrocarbons have been implicated as the agents responsible for the cytotoxic and carcinogenic properties of such compounds (for reviews see [2-41). A detailed knowledge of the properties of epoxide hydratase may, therefore, contribute towards an understanding of the mechanisms of cytotoxicity and carcinogenesis.…
Chromatographic Determination of Thiols After Pre‐column Derivatization witho‐Phthalaldehyde and Isoleucine
2004
Abstract The reaction of primary amines with excess o‐phthalaldehyde (OPA) and thiol yields unique isoindole derivatives that are readily separated by reversed‐phase liquid chromatography. In a previous work, a spectrophotometric procedure was proposed for the assay of N‐acetylcysteine by derivatization with OPA and isoleucine at pH 9.5, with satisfactory results. The chromatographic determination of this and other low molecular‐weight thiols, after isoindole formation with isoleucine, using mobile phases of acetonitrile–water at pH 3 and spectrophotometric detection, is now examined. From the assayed thiols (thioglycolic acid, 3‐mercaptopropionic acid, tiopronin, N‐acetylcysteine, N‐acetyl…