CYANIDE HEMOCHROMOGEN

The Reactions of Cyanide with Globin Hemochromogen

Cyanide can react with globin hemochromogen in two different ways. In the first reaction cyanide combines with globin hemochromogen without displacing or competing with globin. In the second reaction cyanide displaces globin.

On Hemochromogen

1. Every hemochromogen consists of the iron pyrrol complex, reduced heme, combined with some nitrogenous substance. 2. In every hemochromogen there is the equilibrium: Hemochromogen right arrow over left arrow Reduced heme + Nitrogenous substance. 3. Cyanide can form two distinct compounds with reduced heme, one of which is the typical hemochromogen, cyan-hemochromogen. 4. Reduced heme in alkal...

On Pyridine Hemochromogen

1. Cyanide hemochromogen probably contains one cyanide group per heme group. 2. The equilibrium between pyridine hemochromogen and its components, pyridine and reduced heme, is complicated to an unknown extent by the precipitation of reduced heme and the aggregation of pyridine hemochromogen. 3. These complications were not taken into account in R. Hill's experiments on pyridine hemochromogen. ...

A Hemochromogen Component of Liver Microsomes.

Effects of Cyanide and Ethylene on the Respiration of Cyanide-sensitive and Cyanide-resistant Plant Tissues.

The effects of cyanide and ethylene, respectively, were studied on the respiration of a fully cyanide-sensitive tissue-the fresh pea, a slightly cyanide-sensitive tissue-the germinating pea seedling, and a cyanide-insensitive tissue-the cherimoya fruit. Cyanide inhibition of both fresh pea and pea seedling respiration was attended by a conventional Pasteur effect where fermentation was enhanced...