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In contrast, enhancement of IL-2 mRNA expression in neonates was similar to adult levels .
 RNA: IL-2 mRNA; protein: IL-2
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:
 RNA: IL-2 mRNA; protein: IL-2