2697
Induction of the CD11b gene during activation of the monocytic cell line U937 requires a novel nuclear factor MS-2 [published erratum appears in J Immunol 1999 Jul 15;163(2):1091]
 ( protein: nuclear factor, None) , ( DNA: CD11b gene, None) , ( protein: MS-2, None) , ( cell line: monocytic cell line U937, 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: nuclear factor, None) , ( DNA: CD11b gene, None) , ( protein: MS-2, None) , ( cell line: monocytic cell line U937, None) 