12822
We have examined changes in HS1 phosphorylation after differential stimulation of CD3 , CD2 , and CD28 to elucidate its role in T cells and to further delineate the signaling pathways recruited by these receptors.
 CD2, HS1, CD3, T cells, CD28
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, HS1, CD3, T cells, CD28