2159
However, a TH -dependent positive effect is elicited by selective interaction of the THR beta- PPAR but not the THR alpha- PPAR heterodimer with a novel TRE ( DR+2 ).
 THR, PPAR, THR, DR+2, PPAR, TRE, THR beta- PPAR, THR alpha- PPAR heterodimer
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:
 THR, PPAR, THR, DR+2, PPAR, TRE, THR beta- PPAR, THR alpha- PPAR heterodimer