6705
Binding of NF-AT , NF-kappaB , and AP-1 was induced by T-cell receptor ( TcR ) stimulation , although there was no significant upregulation of binding by IL-2 stimulation .
 AP-1, NF-kappaB, NF-AT, TcR, IL-2, T-cell receptor
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, NF-kappaB, NF-AT, TcR, IL-2, T-cell receptor