1911
Differentiation of U-937 cells with 12-O-tetradecanoylphorbol-13-acetate ( TPA ), an activator of the serine/threonine protein kinase C , was associated with transcriptional activation of EGR-1 promoter-reporter constructs .
 ( protein: serine/threonine protein kinase C, None) , ( cell line: U-937 cells, None) , ( protein: protein kinase C, None) , ( DNA: EGR-1 promoter-reporter constructs, 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: serine/threonine protein kinase C, None) , ( cell line: U-937 cells, None) , ( protein: protein kinase C, None) , ( DNA: EGR-1 promoter-reporter constructs, None) 