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• W2340576731 endingPage "755" @default.
• W2340576731 startingPage "745" @default.
• W2340576731 abstract "Abstract The authors' previous studies showed that the glycosaminoglycans present in rabbit bone marrow were composed of chondroitin 6-sulfate (79%) and hyaluronic acid (16%). Immunohistochemically the chondroitin 6-sulfate was demonstrated to be in bone marrow matrix constructing hematopoietic microenvironment. In this study the authors isolated and characterized these glycosaminoglycans in their macromolecular form (i.e., proteoglycans). Bone marrow of 3-month-old rabbits was defatted with organic solvents containing proteinase inhibitors at -20 degrees C, and proteoglycans were extracted from the defatted tissue with 4 mol/L guanidine HCl containing the proteinase inhibitors. After extensive dialysis of the extract against 7 mol/L urea, more than 90% of hexuronate-containing materials was recovered in the urea-soluble fraction. The proteoglycans were purified from the urea-soluble fraction by diethyl aminoethyl (DEAE)-Sephacel chromatography, CsCl density-gradient centrifugation, and Bio-Gel A-5m gel filtration, then were rechromatographed on DEAE-Sephacel and on Bio-Gel A-5m. The proteoglycans were separated into three molecular species with different mol wts that were assessed to be 46,000, 16,000, and 8,300 by sedimentation-equilibrium centrifugation. Amino acid analyses of these proteoglycans revealed that serine and glycine accounted for approximately 60% of the total amino acids common to the three proteoglycans. The glycosaminoglycan side chains of these proteoglycans were converted stoichiometrically into unsaturated 6-sulfated disaccharide by digestion with chondroitinase AC-II, indicating that they were fully sulfated chondroitin 6-sulfate. Their apparent mol wts were estimated by gel filtration on Bio-Gel A-0.5m to be 10,900, 14,400, and 7,700. Computation of these results, taken together with their biochemical composition, revealed that the largest proteoglycan, PG-II, consisted of four chains of the chondroitin 6-sulfate and the core peptide with mol wt of approximately 4,000. The smaller two proteoglycan subpopulations, PG-I and PG-III, consisted of a single glycosaminoglycan chain linked to a small peptide with mol wts of approximately 500 and 1,000, respectively." @default.
• W2340576731 created "2016-06-24" @default.
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• W2340576731 date "1988-08-01" @default.
• W2340576731 modified "2023-09-27" @default.
• W2340576731 title "Isolation and characterization of chondroitin 6-sulfate proteoglycans present in the extracellular matrix of rabbit bone marrow" @default.
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• W2340576731 doi "https://doi.org/10.1182/blood.v72.2.745.745" @default.
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• W2340576731 hasPublicationYear "1988" @default.
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