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Schematic of the domains on human Bub1 protein. From left to right, the domains interacting with KNL1, Bub3, BubR1, Mad1, RZZ, Cdc20, Plk1, B56 (putative) and CENP-F are marked with reported boundaries. The kinase domain is also shown. The numbers below or above the schematic indicate the start and end of the boundaries.
