8187
This RXR agonist activity is blocked by RAR -specific antagonists , suggesting extensive cross-talk between the partners of the RXR -RARalpha403 heterodimer .
 ( protein: -RARalpha403, None) , ( protein: RAR, None) , ( protein: RXR, None) , ( protein: RXR, None) , ( protein: RXR -RARalpha403 heterodimer, 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: -RARalpha403, None) , ( protein: RAR, None) , ( protein: RXR, None) , ( protein: RXR, None) , ( protein: RXR -RARalpha403 heterodimer, None) 