[The incorporation of 35S-heparin into mast cells in the rat and its release into the circulatory bed].

It was shown that the intensity of the clearance of 35S-heparin in the blood is extremely high in the first 30 minutes after the introduction of the label. Further on the intensity of the clearance was decreased and by the 60th minute only 11 per cent of the radioactivity was left and by the 240th minute--3.7%. It was established that during intravenous introduction of 35S-heparin the obese cells are capable of accumulating it from the blood flow.