14976
Deletions delineated a carboxy-terminal dimerization region containing two repeats of 15 amino acids that show similarity with the dimerization domains of basic-helix-loop-helix proteins .
 ( protein: basic-helix-loop-helix proteins, None) , ( protein: carboxy-terminal dimerization region, None) , ( protein: dimerization domains, 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) , ( protein: carboxy-terminal dimerization region, None) , ( protein: dimerization domains, None) 