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We found that NFATx1 DNA binding activity and interaction with AP-1 polypeptides were dependent on its central Rel similarity region and that transcriptional activation was reduced by deletions of either its N-terminal domain or its C-terminal domain , suggesting the presence of intrinsic transcriptional activation motifs in both regions.
 C-terminal domain, N-terminal domain, NFATx1, intrinsic transcriptional activation motifs, central Rel similarity region
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:
 C-terminal domain, N-terminal domain, NFATx1, intrinsic transcriptional activation motifs, central Rel similarity region