5335
The ability of T cells to produce interleukin-2 ( IL-2 ) is a critical control point in T lymphocyte activation .
 IL-2, T cells, interleukin-2
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, T cells, interleukin-2