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Synergy between signal transduction pathways is obligatory for expression of c-fos in B and T cell lines : implication for c-fos control via surface immunoglobulin and T cell antigen receptors .
 c-fos, T cell antigen receptors, surface immunoglobulin, c-fos
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:
 c-fos, T cell antigen receptors, surface immunoglobulin, c-fos