505
Upon mitogenic stimulation , the binding activity of the novel NF-AT -binding factor is rapidly down-regulated in normal T cells , but persists at high levels in Ipr CD4-8- T cells .
 ( protein: NF-AT -binding factor, None) , ( cell line: Ipr CD4-8- T cells, None) , ( protein: NF-AT, None) , ( cell type: T cells, 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: NF-AT -binding factor, None) , ( cell line: Ipr CD4-8- T cells, None) , ( protein: NF-AT, None) , ( cell type: T cells, None) , ( cell type: T cells, None) 