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To elucidate the mechanisms that regulate the constitutive and inducible expression of CD69 by leukocytes , we isolated the promoter region of the CD69 gene and carried out its functional characterization .
 protein: CD69; DNA: promoter region; cell type: leukocytes; protein: CD69
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:
 protein: CD69; DNA: promoter region; cell type: leukocytes; protein: CD69