Feature SITE
Definition Any interesting single amino-acid site on the sequence that is not defined by another feature key. It can also apply to an amino acid bond which is represented by the positions of the two flanking amino acids
Optional* Qualifiers /NOTE="free text"
Comment *The NOTE qualifier is mandatory when SITE is used to annotate an 'other' amino acid as per this standard, and must contain the full name of the amino acid. Otherwise, the NOTE qualifier is optional.