Isolation and characterization of acidic structural glycoproteins in pulmonary tissues

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Abstract
1. Extraction of the pleural and parenchymal regions of bovine lungs with salt and organic solvents gave powders that contained glycoproteins in addition to collagen and elastin. The contents of these glycoproteins (g/100 of powder) was 4% in pleura and 15.5% in parenchyma. 2. Attempts were made to purify these glycoproteins fromboth tissues by various methods. 3. Both tissues contained heterogeneous mixtures that were similar solubilities, had similar amino acid and carbohydrate compostions. 4. The compostions of the pulmonary glycoproteins resembled those isolated from other connective tissues by other workers.