[Comparative analysis of the glycoproteins of the mineralized tissues of several species of animals].

Studies have been made on carbohydrate components of glycoproteids from normally mineralized tissues of different animals. Experiments were made on the scales of the fish Leuciscus idus, on shells of hen eggs, on shells of the molluscs Modiolus modiolus, Anodonta cygnea, Rapana thomasiana, Bithynia tentaculata, on bone tissue, the enamel and dentine from cows, pigs, dogs and albino rats. In the glycoproteids studied, hexoses, fucoses, ketone sugars, hexosamines, uronic and sialic acids were found and quantitatively determined. Using ion-exchange chromatography on DEAE-Sephadex, acid glycosamineglycanes were divided into two fractions--gialuronic acid and chondroitynsulphates. Marked quantitative, for some of the species qualitative differences as well, were found in carbohydrate composition of glycoproteids from mineralized tissues.