Centromere proteins Cenpa , Cenpb , and Bub 3 interact with poly ( ADP ribose ) polymerase 1 protein and are poly ( ADP ribosyl ) ated . ^^^ Here we investigated the interaction of this protein with , and poly ( ADP ribosyl ) ation of , three constitutive centromere proteins , Cenpa , Cenpb , and Cenpc , and a spindle checkpoint protein , Bub 3 . ^^^ Immunoprecipitation and Western blot analyses demonstrate that Cenpa , Cenpb , and Bub 3 , but not Cenpc , interacted with PARP 1 , and are poly ( ADP ribosyl ) ated following induction of DNA damage . ^^^ |