1490
CD28 -dependent induction of c-jun expression requires protein tyrosine kinase activity , but does not depend on activation of a phorbol ester -responsive protein kinase C or elevation of cytosolic calcium .
 ( protein: protein tyrosine kinase, None) , ( DNA: c-jun, None) , ( protein: phorbol ester -responsive protein kinase C, None) , ( protein: CD28, 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: protein tyrosine kinase, None) , ( DNA: c-jun, None) , ( protein: phorbol ester -responsive protein kinase C, None) , ( protein: CD28, None) 