>1z4nA (A:) observed residues (from ATOM records) mfkavlfdldgvitdtaeyhfrawkalaeeigingvdrqfneqlkgvsredslqkildla dkkvsaeefkelakrkndnyvkmiqdvspadvypgilqllkdlrsnkikialasaskngp fllermnltgyfdaiadpaevaaskpapdifiaaahavgvapsesigledsqagiqaikd sgalpigvgrpedlgddivivpdtshytleflkevwlqk