title: Dissociation constants for carbonic anhydrase--sulfonamide binding by high-performance liquid chromatography.
abstract: Carbonic anhydrase-azosulfonamide dissociation constants (Kd) were determined by gel filtration with high-performance liquid chromatography. By measuring the area of the elution peak at two wavelengths, Kd values were derived without having to measure a shallow trough. The procedure proved to be fast and reliable and has a general application. The dissociation constants were measured for 7-acetamido-2-(4'-sulfamylphenylazo)-1-hydroxynaphthalene-3, 6-disulfonate (Neoprontosil) complexes with carbonic anhydrase isozymes CA I, CA II, and CA III from bovine and human sources, and chicken CA III from skeletal muscle.
mesh_terms: D000818:Animals; D002257:Carbonic Anhydrase Inhibitors / Q000378:metabolism*; D002256:Carbonic Anhydrases / Q000378:metabolism*; D002417:Cattle; D002645:Chickens; D002850:Chromatography, Gel; D002851:Chromatography, High Pressure Liquid; D006801:Humans; D011485:Protein Binding; D013053:Spectrophotometry; D013449:Sulfonamides / Q000378:metabolism*
chemical_list: D002257:Carbonic Anhydrase Inhibitors; D013449:Sulfonamides; D002256:Carbonic Anhydrases