1489
In this paper, we report that cross-linking of CD28 (but not CD2 , CD5 , LFA-1 , or CD7 ) leads to an elevation of c-jun mRNA , with only minimal activation of c-fos expression .
 ( DNA: c-fos, None) , ( DNA: c-jun, None) , ( protein: CD28, None) , ( RNA: c-jun mRNA, None) , ( protein: CD2, None) , ( protein: CD7, None) , ( protein: CD5, None) , ( protein: LFA-1, 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:
 ( DNA: c-fos, None) , ( DNA: c-jun, None) , ( protein: CD28, None) , ( RNA: c-jun mRNA, None) , ( protein: CD2, None) , ( protein: CD7, None) , ( protein: CD5, None) , ( protein: LFA-1, None) 