When the amino acid sequence to verify the domain of the protein, and it was found that such a protein prosite is a part of the receptor binding domain at the end of the.
When the amino acid sequences derived monitoring functions and domains. Prosite protein with a protein that is part of the receptor binding domain that is to the end.
When the amino acid sequence to check function and domain of protein with the program PROSITE found such protein is part of the receptor. Binding domain at the end.