Abstract
Coelomic fluid preparations fromHolothuria polii were passed through a Bio-gel A5m column. The 3 separated protein peaks possess hemagglutinating or hemolytic activity against rabbit erythrocytes. Electrophoretic and immunochemical methods showed that 2 identical protein subunits characterized hemagglutinins of different size. Hemolysin differs from hemagglutinin in molecular weight and organization of subunits.