5690
A nucleotide substitution within a recently described OAP40 element located just upstream of an NF-AT site ( P sequence ) appears to be largely responsible for the increased promotor strength of this particular allelic form of the IL-4 promoter .
 IL-4 promoter, NF-AT site, OAP40 element, IL-4, P sequence
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:
 IL-4 promoter, NF-AT site, OAP40 element, IL-4, P sequence