>3d5bN (N:) observed residues (from ATOM records)
ktyvpkqveprwvlidaegktlgrlatkiatllrgkhrpdwtpnvamgdfvvvvnadkir
vtgkkleqkiytrysgypgglkkiplekmlathpervlehavkgmlpkgplgrrlfkrlk
vyagpdhphqaqrpekl