504
Furthermore, nuclear extracts from Ipr CD4-8- T cells display high levels of a novel specific binding activity at the NF-AT site , which is present at much lower levels in freshly isolated normal T lymphocytes .
 ( cell type: T cells, None) , ( DNA: NF-AT site, None) , ( protein: NF-AT, None) , ( cell line: Ipr CD4-8- T cells, None) , ( cell type: normal T lymphocytes, 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:
 ( cell type: T cells, None) , ( DNA: NF-AT site, None) , ( protein: NF-AT, None) , ( cell line: Ipr CD4-8- T cells, None) , ( cell type: normal T lymphocytes, None) 