>3dk3B (B:) observed residues (from ATOM records)
dkwemertditmkhklgggqygevyegvwkkysltvavktlmeveeflkeaavmkeikhp
nlvqllgvctreppfyiitefmtygnlldylrecnrqevsavvllymatqissameylek
knfihrdlaarnclvgenhlvkvadfglsrlmtgdtftahagakfpikwtapeslaynkf
siksdvwafgvllweiatygmspypgidpsqvyellekdyrmerpegcpekvyelmracw
qwnpsdrpsfaeihqafetmfqessisde