5082
The protein is composed of a central alpha - helical portion with globular domains at both NH2 and COOH termini , and the epitope to the monoclonal antibody resides in the central alpha - helical stalk .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 None