Scaling properties of glycine-rich sequences in guanidine hydrochloride solutions.

Effective Parameters on the Partition Coefficient of Guanidine Hydrochloride in the Poly (Ethylene Glycol) +Phosphate +Water System at 298.15 K

Comparative Study Between Different Methods of Collagen Extraction from Fish and its Properties

Collagen is the most abundant protein of animal origin, comprising approximately 30% of total animal protein. There are at least 19 variants of collagen, named type I to XIX. Types I, II, III and V are the fibrous collagens. Type I collagen is found in all connective tissue, including bones and skins. It is a heteropolymer of two "1 chains and one" 2 chain. It consists of one-third glycine, con...

Isolation, fractionation, and preliminary characterization of a novel class of sulfated glycans from the tunic of Styela plicata (Chordata Tunicata).

The sulfated glycans in the tunic of Styela plicata differ from the glycosaminoglycans of animal tissues and also from the sulfated polysaccharides isolated from marine algae. The ascidian glycans occur primarily as three fractions that differ markedly in molecular weight and chemical composition. The high molecular weight fraction encompasses a broad range of molecular weights but is chemicall...

Guanidine hydrochloride: An efficient catalyst for the synthesis of 2-hydrazolyl-4-thiazolidinone derivatives under solvent free conditions

A Highly efficient protocol has been developed for the synthesis of 2-hydrazolyl-4-thiazolidinone derivatives installing a one pot three component coupling reaction of an aromatic aldehyde, thiosemicarbazide and maleic anhydride using guanidine hydrochloride as highly inexpensive and environmentally friendly catalyst under solvent free condition at 1200C with good to excellent yields, It offers...

A method for the quantitative modification and estimation of carboxylic acid groups in proteins.

A method for the rapid modification under mild conditions of carboxyl groups in proteins has been developed. The method involves the activation of the carboxyl group by a water-soluble carbodiimide and the subsequent reaction of the activated carboxyl group with a nucleophile such as glycine methyl ester. The kinetics of the reaction indicates that there are limits to the variation of carbodiim...