7642
Apoptosis induced through the TCR in CD4+ T cells is mostly mediated by the inducible expression of Fas ligand ( FasL ) as a primary event leading to the commitment to death.
 TCR, CD4+ T cells, Fas ligand, FasL
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:
 TCR, CD4+ T cells, Fas ligand, FasL