2640
The amino acid sequence was determined to be residues 716 - 724 and hence lysine residue 721 is located within the ATP - binding site .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
 Entities:  
Answer:
 None