10555
These studies demonstrate that E2a- Pbx1 initiates programmed cell death of hematopoietic precursers by a mechanism that requires its chimeric transcriptional properties, but, unlike other nuclear oncoproteins , is independent of p53 .
 ( cell type: hematopoietic precursers, None) , ( protein: nuclear oncoproteins, None) , ( protein: Pbx1, None) , ( protein: p53, None) , ( protein: E2a- Pbx1, 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:
 ( cell type: hematopoietic precursers, None) , ( protein: nuclear oncoproteins, None) , ( protein: Pbx1, None) , ( protein: p53, None) , ( protein: E2a- Pbx1, None) 