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Positive and negative regulation of the composite octamer motif of the interleukin 2 enhancer by AP-1 , Oct-2 , and retinoic acid receptor .
 AP-1, interleukin 2 enhancer, retinoic acid receptor, composite octamer motif, Oct-2
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:
 AP-1, interleukin 2 enhancer, retinoic acid receptor, composite octamer motif, Oct-2