1870
Ii kappa B-1 is a positive regulatory element in B-cell lines and in the Ii-expressing T-cell line , H9 , but acts as a negative regulatory element in myelomonocytic and glia cell lines .
 ( DNA: positive regulatory element, None) , ( cell line: H9, None) , ( DNA: Ii kappa B-1, None) , ( cell line: Ii-expressing T-cell line, None) , ( cell line: B-cell lines, None) , ( DNA: negative regulatory element, 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: positive regulatory element, None) , ( cell line: H9, None) , ( DNA: Ii kappa B-1, None) , ( cell line: Ii-expressing T-cell line, None) , ( cell line: B-cell lines, None) , ( DNA: negative regulatory element, None) 