The hexokinase activity of animal tumours

comparison of catalytic activity of heteropoly compounds in the synthesis of bis(indolyl)alkanes.

heteropoly acids (hpa) and their salts have advantages as catalysts which make them both economically and environmentally attractive, strong br?nsted acidity, exhibiting fast reversible multi-electron redox transformations under rather mild conditions, very high solubility in polar solvents, fairly high thermal stability in the solid states, and efficient oxidizing ability, so that they are imp...

Adenosine triphosphatase activity of yeast hexokinase and its relation to the mechanism of the hexokinase reaction.

In a series of previous papers (l-5) studies on the crystalline yeast hexokinase prepared by the method of Darrow and Colowick (6) have been reported. It has been shown (2) that the yeast hexokinase has a weak but distinct adenosine triphosphatase activity and that the ratio of these two activities of the enzyme stayed constant through six recrystallizations. It was furthermore shown (5) that t...

Studies on hexokinase. 1. The hexokinase activity of rat-brain extracts.

Spectrophotometric measurement of hexokinase and phosphohexokinase activity.

The methods available for the quantitative assay of these enzymes are based on phosphate transfer determinations and pH change of the reaction mixture. They require large quantities of adenosine triphosphate and, for estimation in crude tissue extracts, the addition of inhibitors such as iodoacetate and sodium fluoride (7). The purpose of this paper is to report a simple and rapid spectrophotom...

Hexokinase Activity from Eggs of the Sea Urchin Arbacia Punctulata

1. The hexokinase activity of homogenates of eggs and embryos of the sea urchin Arbacia punctulata has been measured. Expressed as micrograms glucose consumed at 20 degrees C., per hour per milligram of protein the following values were obtained: unfertilized eggs, 67; fertilized eggs, 72; 24 hour plutei, 94; 48 hour plutei, 226. The concentration of the enzyme in the eggs is small and may be c...