>3gxuB (B:) observed residues (from ATOM records)
sivlepiywnssnskflpgqglvlypqigdkldiicpkvtvqyeyykvymvdkdqadrct
ikentpllncakpdqdikftikfqefspnlwglefqknkdyyiistsngslegldnqegg
vcqtramkilmkvgqdas