Immunogen sequence: MTNQNTNEYL EKIKQRLFEN LRMLPHAPGV QMQAIPEDAI PEESGDEDED DPDKRISICS SDKRIACEEE FSDSEEEGEG GRKNSSNFKK AKRVKTEDEK E. Histone acetylation and deacetylation, catalyzed by multisubunit complexes, play a key role in the regulation of eukaryot