1204
Reporter gene experiments demonstrated that NF-kappa B transcriptional activity is not affected by expression of activated p21ras .
 NF-kappa B, p21ras
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:
 NF-kappa B, p21ras