Carbohydrate content of bovine collagen preparations

The Carbohydrate of Bovine Prothrombin

The inner carbohydrate was resistant to enzymatic attack and consisted of about one-third of the total mannose and one-half of the total iV-acetylglucosamine residues. It was shown that the carbohydrate chain was not attached to serine or threonine and that it is probably linked to asparagine. The cx and p anomeric forms of galactose were present in about a 1: 1 ratio. Glycopeptides containing ...

The glucagon content of crystalline insulin preparations.

Shortly after the discovery of insulin, investigators reported that intravenous administration of this hormone leads to a transient hyperglycemia. Kimball and Murlin (1) suggested that this response was caused by the presence of a second physiologically active substance which they named glucagon. Some workers (2, 3), however, suggested that this effect might be ascribed to insulin, or possibly ...

Hormonal content of thyroid replacement preparations.

The carbohydrate moiety of bovine pancreatic deoxyribonuclease.

Preceding experiments by Price and his associates establish that bovine pancreatic deoxyribonuclease is a glycoprotein which contains glucosamine and mannose. In order to determine the mode of attachment of the carbohydrate to the enzyme molecule, chromatographically purified deoxyribonuclease has been digested with Pronase. Gel filtration of the digest yielded a fraction containing all of the ...

Carbohydrate histochemistry of bovine duodenal glands.

The complex carbohydrates in the bovine duodenal glands were examined histochemically using 5 peroxidase-labeled lectins to achieve a better knowledge of their glycoprotein profiles. The presence of at least 2 different cell types and secretion of neutral mucin were observed in the bovine duodenal glands. The duodenal gland cells located in the central area of the lobules contained neutral glyc...