3492
Our data are most consistent with a model in which recruitment to the TCR allows ZAP-70 autophosphorylation and binding to p56(lck) , which in turn phosphorylates Tyr-492 and/or Tyr-493 with consequent up-regulation of the ZAP-70 kinase activity .
 ZAP-70, p56(lck), ZAP-70, TCR
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:
 ZAP-70, p56(lck), ZAP-70, TCR