>4p18A (A:) observed residues (from ATOM records)
vsqvrqnyhsdceaavnrmlnlelyasytyssmyaffdrddvalhnvaeffkehsheere
haekfmkyqnkrggrvvlqkikkperdewgntleamqaalqlektvnqalldlhklatdk
vdphlcdfleseyleeqvkdikrigdfitnlkrlglpengmgeylfdkhsvk