[Digitonin-sensitive calcium pool and its change during synchronous division of Tetrahymena pyriformis cells].

A very significant intracellular pool of calcium, sensitive to digitonin action and different from one of free cytozolic Ca2+, has been shown to exist in the cells of ciliate protozoan T. pyriformis. Calcium content in digitonin-sensitive pool NdigCa2+ has been estimated throughout the cell cycle in synchronized culture of T.