13252
We now provide evidence for a CD2 -based signaling pathway which, in contrast to that of the T cell receptor , is independent of p56 .
 CD2, p56, T cell receptor
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:
 CD2, p56, T cell receptor