Introduction
Cell division has fascinated cell biologists for more than a hundred years. Among many good reasons for this fascination is that mitosis and cytokinesis are beautiful to watch: M phase undoubtedly represents the most dramatic phase of the entire cell cycle, and most cellular structures undergo profound reorganizations. In all eukaryotic organisms, including fungi, plants and animals, a microtubule (MT)-based spindle apparatus is assembled and used for chromosome segregation. …