The cell cycle has been the subject of intense investigation during two periods since Virchow's 1855 realization that cells only arise from pre-existing cells. At the turn of the century ...

The stain can be applied to live, detergent-permeabilized or fixed cells for quantification of their distribution among the three main phases of the cell cycle (G 0 /G 1, S and G 2 /M).

A life cycle is the series of stages something passes through during its lifetime. We also use the term for things that are not living, like cell phones. The life cycle for anything you buy includes ...