sentences:  Aurora B may be involved in the localization of MAD2 and BubR1, proteins that recognize correct chromosome attachment to spindle microtubules.Loss of Aurora B lowers the concentration of Mad2 and BubR1 at the kinetochores.In particular, Aurora B seems to be responsible for maintaining the localization of Mad2 and BubR1 to the kinetochore following their initial recruitment, which occurs independent of Aurora B. Aurora B may be directly or indirectly involved in the hyper-phosphorylation of BubR1 seen in mitosis in wild-type cells.