42
Mouse interleukin-2 receptor alpha gene expression .
 Mouse interleukin-2 receptor alpha gene, 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:
 Mouse interleukin-2 receptor alpha gene, interleukin-2