8186
Unexpectedly, we observed that an RXR -specific , rather than an RAR -specific , agonist induces terminal granulocytic differentiation of MPRO promyelocytes , and this differentiation is associated with activation of DNA response elements corresponding to RAR-RXR heterodimers rather than RXR-RXR homodimers .
 ( protein: RXR-RXR homodimers, None) , ( protein: RXR, None) , ( protein: RXR-RXR, None) , ( cell type: MPRO promyelocytes, None) , ( protein: RAR, None) , ( protein: RAR-RXR heterodimers, None) , ( DNA: DNA response elements, 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: RXR-RXR homodimers, None) , ( protein: RXR, None) , ( protein: RXR-RXR, None) , ( cell type: MPRO promyelocytes, None) , ( protein: RAR, None) , ( protein: RAR-RXR heterodimers, None) , ( DNA: DNA response elements, None) 