Abstract
1. Glycosaminoglycans were extracted with 2m-potassium chloride from bovine aorta and purified by precipitation with cetylpyridinium chloride from 0.5m-potassium chloride. The yield amounted to 24% of the total glycosaminoglycan content of the tissue. 2. After removal of chondroitin sulphate by digestion with testicular hyaluronidase, the residual glycosaminoglycan material (11% of the extracted polysaccharide) was fractionated by gel chromatography on Sephadex G-200. Two peaks (I and II) were obtained, the more retarded of which (II) corresponded to single polysaccharide chains. 3. The macromolecular properties of fraction I were investigated by repeated gel chromatography, after treatment of the fraction with alkali or digestion with papain. In both cases the elution position of fraction I was shifted towards that of the single polysaccharide chains. 4. Analysis of fraction I showed approximately equal amounts of heparan sulphate and dermatan sulphate. It is concluded that these glycosaminoglycans both occur in the aortic wall as multichain proteoglycans.
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