Chains and heterogens:
PDB Chain Sequences:
>1ls6A (A:) meliqdtsrppleyvkgvplikyfaealgplqsfqarpddllistypksgttwvsqildm iyqggdlekchrapifmrvpflefkapgipsgmetlkdtpaprllkthlplallpqtlld qkvkvvyvarnakdvavsyyhfyhmakvhpepgtwdsflekfmvgevsygswyqhvqeww elsrthpvlylfyedmkenpkreiqkilefvghslpeetvdfmvqhtsfkemkknpmtny ttvpqefmdhsispfmrkgmagdwkttftvaqnerfdadyaekmagcslsfrsel
>1ls6A (A:) srppleyvkgvplikyfaealgplqsfqarpddllistypksgttwvsqildmiyqggdl ekchrapifmrvpflefkapgipsgmetlkdtpaprllkthlplallpqtlldqkvkvvy varnakdvavsyyhfyhmakvhpepgtwdsflekfmvgevsygswyqhvqewwelsrthp vlylfyedmkenpkreiqkilefvghslpeetvdfmvqhtsfkemkknpmtnyttvpqef mdhsispfmrkgmagdwkttftvaqnerfdadyaekmagcslsfrsel