[Genetic control of the ACTH content of mouse plasma]

The content of ACTH in blood plasma of C57BL/6, BALB/C, F1, F2, and F1 X BALB/C mice was measured before and after an open-field exposure to emotional stress. Differences in the initial content of hormone and its changes after stress were revealed as dependent on the animal line. A suggestion is made about monogenic control over the initial level of ACTH.