[Glucose-6-phosphate dehydrogenase activity in rat serum in hyperoxia, hypoxia, and cooling]

Activity of glucose-6-phosphate dehydrogenase (G6PD) was increased in blood serum in hypoxic hypoxia, hypoxia and cooling stress. The degree of this alteration depended on duration of the action of the effectors and on oxygen pressure. Adaptation to cooling was characterized by stabilization of enzymatic activity at the new metabolic step. Mechanisms of G6PD activation in blood serum under conditions of extreme states as well as the possibilities of utilization of this phenomenon as a test are discussed.