3933
The variant Id-3L protein is functionally distinguishable from conventional Id-3 since in in vitro DNA mobility shift assays , it was greatly impaired in its ability to abrogate binding of the basic helix-loop-helix protein , E47 , to an E box recognition sequence .
 ( protein: helix-loop-helix protein, None) , ( protein: E47, None) , ( protein: Id-3, None) , ( DNA: E box recognition sequence, None) , ( protein: Id-3L protein, 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: helix-loop-helix protein, None) , ( protein: E47, None) , ( protein: Id-3, None) , ( DNA: E box recognition sequence, None) , ( protein: Id-3L protein, None) 