2578
Deletion constructs of the pCD41 clone demonstrated that ORF-A was critical for the HIV LTR activation.
 ( DNA: pCD41 clone, None) , ( DNA: pCD41, None) , ( protein: ORF-A, None) , ( DNA: HIV LTR, 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: pCD41 clone, None) , ( DNA: pCD41, None) , ( protein: ORF-A, None) , ( DNA: HIV LTR, None) 