8930
We have now identified a 229-bp region of the distal 5' flank of the alpha2 integrin gene required for high-level enhancer activity in cells with megakaryocytic features .
 ( DNA: 229-bp region, None) , ( DNA: distal 5#$%# flank, None) , ( DNA: alpha2 integrin gene, None) , ( cell type: high-level enhancer activity in cells, None) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 ( DNA: 229-bp region, None) , ( DNA: distal 5#$%# flank, None) , ( DNA: alpha2 integrin gene, None) , ( cell type: high-level enhancer activity in cells, None) 