3772
In conclusion, E(gre) motifs and interacting basic helix-loop-helix proteins are important determinants for MLV transcriptional activity in lymphocytic cell lines .
 ( protein: basic helix-loop-helix proteins, None) , ( cell line: lymphocytic cell lines, None) , ( DNA: E(gre), 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: basic helix-loop-helix proteins, None) , ( cell line: lymphocytic cell lines, None) , ( DNA: E(gre), None) 