[Cell cycle dependent changes of the cellular ultrastructure]

A survey of the cell ultrastructure studies during G- and S-phases shows that the few findings known so far do not suffice to formulate a general conclusion. In the spindle area the specific cell structure is dedifferentiating during the mitotic cycle. Outside the spindle area the specific cell structures may remain intact partly or in full. It can be concluded from this fact that cellular proliferation and the process of specific cell functions do not exclude each other but may happen simultaneously.