9573
In vitro, the ICAM-1 kappa B site appeared to bind RelA and c-Rel homodimers as well as heterodimers with NF-kappa B1 , but weakly NF-kappa B1 homodimers .
 ICAM-1 kappa B site, RelA, NF-kappa B1 homodimers, NF-kappa B1, c-Rel homodimers
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:
 ICAM-1 kappa B site, RelA, NF-kappa B1 homodimers, NF-kappa B1, c-Rel homodimers