[Change in the RNA polymerase activity in heart and liver cells during immobilization stress]

Immobilization stress produces changes in the activity of polymerase I and II RNA in heart and liver cells. At the beginning of the poststressor reaction of the body the activity of both enzymes is lowered. Later on the activity of polymerase I RNA considerably exceeds the control level, whereas the activity of polymerase II RNA returns to the initial values.