[Concentration of free nucleotides in the muscles of adrenalectomized rats undergoing cold stress].

The energy exchange was studied in striated muscles of adrenalectomized rats exposed to 4-hour cold stress (+ 3 degrees C). Cold stress did not change ATP levels but decreased the content of creatine phosphate, glycogen and inorganic phosphorus in muscles. A decrease in the inorganic phosphorus content may indicate enhanced phosphorylation in the glycolytic chain.