sentences:  Localization of Aurora B to the centromere during prometaphase and metaphase requires phosphorylation of the mammalian kinetochore-specific histone-H3 variant centromere protein A (CENP-A).CENP-A associates with the centromere and is necessary for assembly of the kinetochore.Phosphorylation of CENP-A at serine 7 by Aurora A kinase recruits Aurora B to the centromere.