>3rbcN (N:) observed residues (from ATOM records)
vsqvrqnyhsdceaavnrmlnlelyasytyssmyaffdrddvalhnvaeffkehsheere
haekfmkyqnkrggrvvlqdikkperdewgntleamqaalqlektvnqalldlhklatdk
vdphlcdfleseyleeqvkdikrigdfitnlkrlglpengmgeylfdkhsvk