6864
Repression by Ikaros proteins correlates with hypo-acetylation of core histones at promoter sites and is relieved by histone deacetylase inhibitors .
 ( protein: Ikaros, None) , ( protein: core histones, None) , ( DNA: promoter sites, None) , ( protein: histone deacetylase, None) , ( protein: Ikaros proteins, None) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 ( protein: Ikaros, None) , ( protein: core histones, None) , ( DNA: promoter sites, None) , ( protein: histone deacetylase, None) , ( protein: Ikaros proteins, None) 