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Upon cellular activation , expression of the L-selectin gene is downregulated at both the protein and mRNA levels .
 DNA: L-selectin gene; protein: L-selectin
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 DNA: L-selectin gene; protein: L-selectin