10578
This employs an Escherichia coli tester strain carrying a modified lac operon as a reporter gene , with the lac operator sequence replaced by an octamer sequence .
 ( DNA: octamer sequence, None) , ( DNA: reporter gene, None) , ( DNA: modified lac operon, 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: octamer sequence, None) , ( DNA: reporter gene, None) , ( DNA: modified lac operon, None) 