If pharmaceutical researchers want to learn how to keep cancer cells from dividing uncontrollably, they should focus on create something for Cell division, mitosis, that is the most complex process a cell can undergo. The nucleus disappears, and the chromosomes have to line up and then separate and go to one of the daughters. What it has been seen is that when Mad1 is missing, everything goes so fast that mistakes are made. And from those failures arise cells with tumor potential.