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IL-1 beta and IL-6 genes contain AP-1 binding sites as regulatory elements , the AP-1 protein being composed of c-jun and c-fos gene products .
 IL-6, IL-1 beta, IL-6 genes, AP-1, AP-1, AP-1 binding sites, IL-1 beta and IL-6 genes, regulatory elements
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:
 IL-6, IL-1 beta, IL-6 genes, AP-1, AP-1, AP-1 binding sites, IL-1 beta and IL-6 genes, regulatory elements