13942
Interestingly, the combination of the RAR-selective antagonist and 9-cis RA resulted in partial differentiation and apoptosis of HL-60 and NB4 cells , whereas the RAR antagonist completely blocked all-trans RA -induced differentiation and apoptosis of the cells.
 ( protein: RAR, 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: RAR, None) 