7548
The results of supershift analysis using specific antibodies against transcription factors suggested that both binding complexes contained the NF-kappaB components p50 and p65 , and did not contain other NF-kappaB proteins ( p52 , c-Rel , Rel B ), AP-1 proteins ( c-Fos , C-Jun ), CREB or C/EBPbeta ( NF-IL6 ).
 p50, NF-IL6, AP-1 proteins, c-Rel, p65, NF-kappaB, NF-kappaB, CREB, C/EBPbeta, transcription factors, Rel B, p52, NF-kappaB components, C-Jun, c-Fos, NF-kappaB proteins
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:
 p50, NF-IL6, AP-1 proteins, c-Rel, p65, NF-kappaB, NF-kappaB, CREB, C/EBPbeta, transcription factors, Rel B, p52, NF-kappaB components, C-Jun, c-Fos, NF-kappaB proteins