11615
In the four representative mutants investigated, the DNA reiterations all started within a six-base-pair consensus sequence , G(or C)CTGTG , located in the second exon of the E1a region (at nt 1333 , 1367 , or 1419 ).
 ( DNA: exon, None) , ( DNA: E1a region, None) , ( DNA: six-base-pair consensus sequence, None) , ( DNA: DNA reiterations, 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: exon, None) , ( DNA: E1a region, None) , ( DNA: six-base-pair consensus sequence, None) , ( DNA: DNA reiterations, None) 