13817
In order to study the transcriptional control of 15-LO expression , we have cloned and sequenced the human 15-LO promoter region .
 ( protein: 15-LO, None) , ( DNA: human 15-LO promoter region, None) , ( protein: 15-LO, 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:
 ( protein: 15-LO, None) , ( DNA: human 15-LO promoter region, None) , ( protein: 15-LO, None) 