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SLP-76 ( SH2 domain leukocyte protein of 76 kDa) is a recently identified substrate of the TCR-stimulated protein tyrosine kinases that functions in the signal transduction cascade linking the TCR with IL-2 gene expression .
 TCR, SLP-76, tyrosine kinases, IL-2, TCR-stimulated protein, SH2 domain leukocyte protein
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, SLP-76, tyrosine kinases, IL-2, TCR-stimulated protein, SH2 domain leukocyte protein