4534
The contribution to T cell-specific expression by other promoter sites was assessed in a transient expression assay with IL-3 promoter constructs linked to a luciferase gene , focusing initially on the core binding factor (CBF) site , which is footprinted in vivo upon T cell activation .
 ( protein: IL-3, None) , ( protein: core binding factor, None) , ( DNA: IL-3 promoter constructs, None) , ( DNA: core binding factor (CBF) site, None) , ( DNA: luciferase gene, None) , ( DNA: promoter sites, 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: IL-3, None) , ( protein: core binding factor, None) , ( DNA: IL-3 promoter constructs, None) , ( DNA: core binding factor (CBF) site, None) , ( DNA: luciferase gene, None) , ( DNA: promoter sites, None) 