607
Utilizing transient transfection assays in the fetal erythroid cell line , K562 , we have shown that the core enhancer of hypersensitivity site 2 can preferentially interact with the proximal gamma-promoter in the absence of the SSE , completely silencing a linked beta-promoter .
 ( DNA: SSE, None) , ( DNA: core enhancer, None) , ( DNA: hypersensitivity site 2, None) , ( cell line: fetal erythroid cell line, None) , ( cell line: K562, None) , ( DNA: proximal gamma-promoter, None) , ( DNA: linked beta-promoter, 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: SSE, None) , ( DNA: core enhancer, None) , ( DNA: hypersensitivity site 2, None) , ( cell line: fetal erythroid cell line, None) , ( cell line: K562, None) , ( DNA: proximal gamma-promoter, None) , ( DNA: linked beta-promoter, None) 