Sequence alignment between 4jtd(Y) and UniProt seq P13487 (KAX11_LEIHE):

P13487 (KAX11_LEIHE): Potassium channel toxin alpha-KTx 1.1 from Leiurus hebraeus 
                 10        20        30        40        50         
         ---------+---------+---------+---------+---------+---------
UniProt: MKILSVLLLALIICSIVGWSEAQFTNVSCTTSKECWSVCQRLHNTSRGKCMNKKCRCYS
         ......................X.........................X..........
PDB seq: ----------------------XFTNVSCTTSKECWSVCQRLHNTSRGMCMNKKCRCYS
                               ---------+---------+---------+-------
                                       10        20        30