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In a series of electrophoretic mobility shift assays with protein extracts of highly polarized Th2 clones from atopics and Th1 clones from controls we compared DNA-binding activities at the two NFAT-binding elements P0 and P1 of the crucial proximal human IL-4 promoter .
 IL-4 promoter, P0, NFAT-binding elements, highly polarized Th2 clones, P1, Th1 clones
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, P0, NFAT-binding elements, highly polarized Th2 clones, P1, Th1 clones