>pdb|1sst|A B C MTLDVWQHIRQEAKELAENEPMLASFFHSTILKHQNLGGALSYLLANKLANPIMPAISLREIIEEAYQSNPSIIDCAACDIQAVRHRDPAVELWSTPLLYLKGFHAIQSYRITHYLWNQNRKSLALYLQNQISVAFDVDIHPAAKIGHGIMFDHATGIVVGETSVIENDVSILQGVTLGGTGKESGDRHPKVREGVMIGAGAKILGNIEVGKYAKIGANSVVLNPVPEYATAAGVPARIVSQDKAAKPAFDMNQYFIGIDDGMNLNI