11319
Identification of sequence alterations in the upstream regulatory region of the estrogen receptor gene in an ER-negative breast cancer cell line .
 ( DNA: upstream regulatory region, None) , ( cell line: ER-negative breast cancer cell line, None) , ( DNA: estrogen receptor gene, 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: upstream regulatory region, None) , ( cell line: ER-negative breast cancer cell line, None) , ( DNA: estrogen receptor gene, None) 