3580
Transfection of an expression vector containing ORF2 but not full length cDNA was able to transform NIH3T3 cells and induce tumors in nude mice .
 ( DNA: full length cDNA, None) , ( cell line: NIH3T3 cells, None) , ( DNA: ORF2, None) , ( DNA: expression vector, 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: full length cDNA, None) , ( cell line: NIH3T3 cells, None) , ( DNA: ORF2, None) , ( DNA: expression vector, None) 