>4xchB (B:) observed residues (from ATOM records)
ldhtivkapyirliseevgpkgdiitnfdirliqpnenamdtaglhtiehllaklirqri
dglidcspfgcrtgfhmimwgkqdsekiaqvikssleeiaegitwedvpgttiescgnyk
dhslhsakewaklilsqgistdaferkpi