6444
Tyrphostin AG-490 inhibits cytokine-mediated JAK3 /STAT5a/b signal transduction and cellular proliferation of antigen-activated human T cells .
 ( protein: /STAT5a/b, None) , ( protein: JAK3, None) , ( cell type: T cells, None) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 ( protein: /STAT5a/b, None) , ( protein: JAK3, None) , ( cell type: T cells, None) 