8382
Surprisingly, although stimulation of Jurkat T cells with either CHO-CD80 or anti-CD28 mAb resulted in robust tyrosine phosphorylation of CD28 itself, ligation with CHO-CD86 was unable to induce detectable CD28 tyrosyl phosphorylation over a range of stimulation conditions.
 ( protein: CD28, None) , ( protein: CHO-CD80, None) , ( protein: CHO-CD86, None) , ( protein: anti-CD28 mAb, None) , ( cell line: Jurkat T cells, 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: CD28, None) , ( protein: CHO-CD80, None) , ( protein: CHO-CD86, None) , ( protein: anti-CD28 mAb, None) , ( cell line: Jurkat T cells, None) , ( protein: CD28, None) 