4717
We conclude that the MAP kinase signal transduction pathway consisting of Raf-1 , MEK1 , and ERK1 and ERK2 functions in the stimulation IL-2 gene transcription in activated T lymphocytes .
 IL-2, Raf-1, ERK1, MAP kinase, T lymphocytes, ERK2, MEK1, 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, Raf-1, ERK1, MAP kinase, T lymphocytes, ERK2, MEK1, IL-2 gene