11311
AML1a but not AML1b inhibits erythroid differentiation induced by sodium butyrate and enhances the megakaryocytic differentiation of K562 leukemia cells .
 ( protein: AML1a, None) , ( cell type: K562 leukemia cells, None) , ( protein: AML1b, 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: AML1a, None) , ( cell type: K562 leukemia cells, None) , ( protein: AML1b, None) 