Effects of Temperature, pH, and Organic Phosphates on Fish Hemoglobins

This review presents data on effects of temperature, pH, and organic phosphates on structural-functional characteristics of fish hemoglobins. Special attention is paid to the structure of pigments insensitive to pH as well as those that have the reverse Bohr effect in alkaline range of pH. The role of surface β-adrenoreceptors and activity of Na^sup +^/H^sup +^ exchanger in regulation of the acid-base equilibrium of intraerythrocyte medium are considered. There are compared characteristics of participation of nucleotide triphosphates, 2,3-DPG, and other organic phosphates in correction of fish hemoglobin affinity to oxygen. The values of ΔH for fish respiratory pigments are presented, and their dependence on conditions of erythrocyte microsurrounding is discussed.[PUBLICATION ABSTRACT]