3655
Moreover, mRNA for IL-2 and IFN-gamma could not be detected.
 IL-2, mRNA, IFN-gamma
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:
 IL-2, mRNA, IFN-gamma