3907
These results suggest that IFN-alpha5 and IFN-beta are produced at low levels in normal tissues and play an important role in the regulation of cell function and in the maintenance of homeostasis .
 IFN-beta, IFN-alpha5
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:
 IFN-beta, IFN-alpha5