[The plasma protein film on rat erythrocytes after application of methylcholanthrene]

By means of a special procedure of preparing and colouring blood smears of adult male Wistar rats the plasma protein film (PPF) on erythrocytes was investigated before and after injecting 3 mg of 20-methylcholanthren per animal. It was as early as on the 14th day post injection that a significant alteration of PPF towards initial and control values could be found. Causes and possible consequences are discussed.