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IL-2 responsiveness requires three distinct elements within the enhancer .
 DNA: enhancer; protein: IL-2; DNA: elements
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
 Entities: enhancer, IL-2, elements 
Answer:
 DNA: enhancer; protein: IL-2; DNA: elements