5988
In the current study, we show 9-cis retinoic acid ( RA ), a ligand for the nuclear hormone receptor retinoid X receptor ( RXR ) and retinoic acid receptor ( RAR ), markedly induces the expression of MCP-1 .
 ( protein: MCP-1, None) , ( protein: RAR, None) , ( protein: RXR, None) , ( protein: retinoic acid receptor, None) , ( protein: nuclear hormone receptor retinoid X receptor, 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: MCP-1, None) , ( protein: RAR, None) , ( protein: RXR, None) , ( protein: retinoic acid receptor, None) , ( protein: nuclear hormone receptor retinoid X receptor, None) 