4286
Second, a glutathione -S-transferase ( GST ) affinity-binding assay showed that the interaction of holo- TFIIA with GST- Tax was 20-fold higher than that observed with either the GST- Tax M32 activation mutant or the GST control.
 Tax, GST- Tax, GST, TFIIA, GST- Tax M32 activation mutant, M32, Tax
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:
 Tax, GST- Tax, GST, TFIIA, GST- Tax M32 activation mutant, M32, Tax