title: A typical dermatan sulfate isolate from whale intestine.
abstract: Alkaline extraction of whale intestine, followed by pronase digestion and precipitation of heparin (omega-heparin) with dodecyltrimethylammonium chloride gave a supernatant fraction containing dermatan sulfate. Ethanol at 20% concentration precipitated dermatan sulfate from the supernatant fraction. The crude dermatan sulfate was further fractionated by ion-exchange column chromatography on Dowex-1 (C1- form), eluting stepwise with aqueous sodium chloride. The fractions eluted with 1.5M and 1.75M sodium chloride contained a typical dermatan sulfate. Chemical and enzymic studies of these preparations revealed that the sulfate groups were located solely at O-4 of the 2-acetamido-2-deoxy-D-galactose resides. L-Iduronic acid was assumed to be distributed uniformly in the backbone of the polysaccharide chain, with D-glucuronic acid being located in the linkage region to the protein core. A new method for determining the ratio of D-glucuronic to L-iduronic acid is also described.
mesh_terms: D000818:Animals; D002807:Chondroitin / Q000031:analogs & derivatives*; D003871:Dermatan Sulfate / Q000302:isolation & purification*; D005965:Glucuronates / Q000032:analysis; D007067:Iduronic Acid / Q000032:analysis; D007422:Intestines / Q000032:analysis*; D008722:Methods; D008970:Molecular Weight; D014907:Whales
chemical_list: D005965:Glucuronates; D003871:Dermatan Sulfate; D007067:Iduronic Acid; D002807:Chondroitin