14314
The effect of this synergism was perceptible at the level of induction of the IL-2 gene , a process critical for T cell growth .
 IL-2, IL-2 gene
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, IL-2 gene