6427
Freshly isolated T cells from lupus patients , rheumatoid arthritis ( RA ) patients , and normal individuals were activated physiologically via the TCR with anti-CD3 and anti-CD28 Abs to assess proximal membrane signaling, and with PMA and a calcium ionophore ( A23187 ) to bypass membrane-mediated signaling events .
 ( protein: TCR, None) , ( cell type: T cells, None) , ( protein: anti-CD3, None) , ( protein: anti-CD28 Abs, 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: TCR, None) , ( cell type: T cells, None) , ( protein: anti-CD3, None) , ( protein: anti-CD28 Abs, None) 