title: The molecular-weight range of mucosal-heparin preparations.
abstract: A recently reported method describes the determination of the molecular-weight range of heparins by using an electrofocusing procedure to isolate individual molecular species. Commercially available heparins were fractionated on a column of polyacrylamide-agarose gel to give fractions whose molecular weights were estimated by viscometry. Fractions with mutually exclusive molecllar-weight ranges gave an appreciable number of common bands when subjected to the electrofocusing procedure; therefore, each of these bands cannot be formed from a single molecular species of heparin. Other mucopolysaccharides also gave band sequences indistinguishable from those of heparin; they differed in position and intensity with different ampholyte batches, and probably arose from individual molecular species of the ampholyte rather than the mucopolysaccharide. The molecular-weight range of the heparin was observed to be broader than that usually reported.
mesh_terms: D002850:Chromatography, Gel; D006493:Heparin; D007525:Isoelectric Focusing; D008970:Molecular Weight; D014783:Viscosity
chemical_list: D006493:Heparin