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The deduced amino acid sequence similarity to the proteins encoded by these two latter genes is approximately 65% and includes domains and amino acid residues (the leucine zipper-like and the RGD domain , a serine and a histidine residue in the NH2- and in the COOH-terminal portion of the protein, respectively) postulated to be important for nm23 function .
 ( protein: nm23, None) , ( protein: COOH-terminal portion, None) , ( protein: amino acid sequence, None) , ( protein: NH2-, None) , ( protein: leucine zipper-like, None) , ( protein: RGD domain, 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: nm23, None) , ( protein: COOH-terminal portion, None) , ( protein: amino acid sequence, None) , ( protein: NH2-, None) , ( protein: leucine zipper-like, None) , ( protein: RGD domain, None) 