1.11.1.8 additional information - an accurate and sensitive colorimetric assay for the titration of haloperoxidase activities is developed. The method is based on the specific increase in absorbance at 620 nm that occurs on the halogenation of thymol blue. The quantitative determination of both iodo- and bromoperoxidase activities with the same assay is now possible 684414 1.11.1.8 additional information - development of an ELISA system for quantitative determination of thyroid peroxidase in biological fluids, based on the use of an analytical pair of monoclonal antibodies, one of which is immobilized on solid phase, the other being present in solution. The use of this system made it possible to determine the biochemical characteristics of immunoaffinity chromatography of the enzyme and propose a new method for obtaining a highly purified preparation of its protein 671397 1.11.1.8 2.42 - mutant G387R, pH 7.4, temperature not specified in the publication 743286 1.11.1.8 3.06 - mutant C808R, pH 7.4, temperature not specified in the publication 743286 1.11.1.8 4.6 - mutant P499L, pH 7.4, temperature not specified in the publication 743286 1.11.1.8 7.22 - wild-type, pH 7.4, temperature not specified in the publication 743286 1.11.1.8 31 - - 439715 1.11.1.8 32 - purified enzyme 439714 1.11.1.8 138 - purified enzyme with guaiacol as substrate 439716 1.11.1.8 180 - pH 7.4, 25°C 742675