13614
Elucidation of the mechanism involved in this inhibition of IgE production shows that epsilon germline transcription is decreased by RA , whereas production of interferon-gamma ( IFN-gamma ) was not enhanced in the presence of RA .
 germline, IgE, interferon-gamma, IFN-gamma
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:
 germline, IgE, interferon-gamma, IFN-gamma