>4k68A (A:) observed residues (from ATOM records)
rtgikdfykddfrigtavatatltmkekkpllaliarefnaitpencmkweplkpqdkdw
hweaadkfvefgekhkmyivghnlvwhsqvpkevflnesggtiskealtakmqdhiatla
grykgriqawdvvneaveddgswrkspwynimgedfiakaftmahevdpkahliyndynt
espikrnfivgmiknfkkqgvpihgvgmqehlaidgpsvdeiektlialadagvrahite
ldidvlpsvfeykperdpyiqglpkdmeeklakryedifkiylkhrdkiervtlwgtadn
etwlndfpikgrtnypllfdrnqkpkpayfrlldlkk