>3kx4B (B:) observed residues (from ATOM records)
ikempqpktfgelknlpllntdkpvqalmkiadelgeifkfeapgrvtrylssqrlikea
cdesrfdknlsqalkfvrdfagdglftswtheknwkkahnillpsfsqqamkgyhammvd
iavqlvqkwerlnadehievpedmtrltldtiglcgfnyrfnsfyrdqphpfitsmvral
deamnklqranpddpaydenkrqfqedikvmndlvdkiiadrkasgeqsddllthmlngk
dpetgeplddeniryqiitfliaghettsgllsfalyflvknphvlqkaaeeaarvlvdp
vpsykqvkqlkyvgmvlnealrlwptapafslyakedtvlggeyplekgdelmvlipqlh
rdktiwgddveefrperfenpsaipqhafkpfgngqracegqqfalheatlvlgmmlkhf
dfedhtnyeldiketltlkpegfvvkakskkipl