>1ls6A (A:) observed residues (from ATOM records)
srppleyvkgvplikyfaealgplqsfqarpddllistypksgttwvsqildmiyqggdl
ekchrapifmrvpflefkapgipsgmetlkdtpaprllkthlplallpqtlldqkvkvvy
varnakdvavsyyhfyhmakvhpepgtwdsflekfmvgevsygswyqhvqewwelsrthp
vlylfyedmkenpkreiqkilefvghslpeetvdfmvqhtsfkemkknpmtnyttvpqef
mdhsispfmrkgmagdwkttftvaqnerfdadyaekmagcslsfrsel