4014
In addition, antagonists show distinctly different requirements for efficient binding, which may contribute to their interference in the ligand-inducible transactivation function of RAR alpha .
 RAR alpha
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 RAR alpha