EN
The activity of isocitrinic dehydrogenase (ICDH) was tested in blood serum, liver, brain, kidneys, lungs, heart and femoral muscles of thyroxinized and control rabbits. This activity was considerably higher in tissues of rabbits in hyperthyreosis. In blood serum, however, the activity of ICDH in hyperthyreosis and control animals was similar or only insignificantly higher in hyperthyreosis.