10247
Thus , CHOP not only is a negative or a positive regulator of C / EBP target genes but also , when tethered to AP - 1 factors , can activate AP - 1 target genes .
 CHOP, C / EBP, AP - 1 factors, AP - 1
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 CHOP, C / EBP, AP - 1 factors, AP - 1