12827
Thus, although CD3 , CD28 , and CD2 activate many of the same signaling molecules , they differed in their capacity to induce the tyrosine phosphorylation of HSI .
 CD3, CD28, HSI, signaling molecules
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:
 CD3, CD28, HSI, signaling molecules