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Therefore, we compared the nucleotide sequences of the CD11a , CD11b , and CD11c gene promoters to identify common elements that might contribute to inducible expression .
 nucleotide sequences
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:
 nucleotide sequences