Chains and heterogens:
PDB Chain Sequences:
>1xm4A (A:) mgsshhhhhhssglvprgshmsisrfgvntenedhlakeledlnkwglnifnvagyshnr pltcimyaifqerdllktfrissdtfitymmtledhyhsdvayhnslhaadvaqsthvll stpaldavftdleilaaifaaaihdvdhpgvsnqflintnselalmyndesvlenhhlav gfkllqeehcdifmnltkkqrqtlrkmvidmvlatdmskhmslladlktmvetkkvtssg vllldnytdriqvlrnmvhcadlsnptkslelyrqwtdrimeeffqqgdkerergmeisp mcdkhtasveksqvgfidyivhplwetwadlvqpdaqdildtlednrnwyqsmipqspsp pldeqnrdcqglmekfqfeltldeedsegpekegeghs
>1xm4A (A:) edhlakeledlnkwglnifnvagyshnrpltcimyaifqerdllktfrissdtfitymmt ledhyhsdvayhnslhaadvaqsthvllstpaldavftdleilaaifaaaihdvdhpgvs nqflintnselalmyndesvlenhhlavgfkllqeehcdifmnltkkqrqtlrkmvidmv latdmskhmslladlktmvetkkvtssgvllldnytdriqvlrnmvhcadlsnptkslel yrqwtdrimeeffqqgdkerergmeispmcdkhtasveksqvgfidyivhplwetwadlv qpdaqdildtlednrnwyqsmip
>1xm4B (B:) mgsshhhhhhssglvprgshmsisrfgvntenedhlakeledlnkwglnifnvagyshnr pltcimyaifqerdllktfrissdtfitymmtledhyhsdvayhnslhaadvaqsthvll stpaldavftdleilaaifaaaihdvdhpgvsnqflintnselalmyndesvlenhhlav gfkllqeehcdifmnltkkqrqtlrkmvidmvlatdmskhmslladlktmvetkkvtssg vllldnytdriqvlrnmvhcadlsnptkslelyrqwtdrimeeffqqgdkerergmeisp mcdkhtasveksqvgfidyivhplwetwadlvqpdaqdildtlednrnwyqsmipqspsp pldeqnrdcqglmekfqfeltldeedsegpekegeghs
>1xm4B (B:) edhlakeledlnkwglnifnvagyshnrpltcimyaifqerdllktfrissdtfitymmt ledhyhsdvayhnslhaadvaqsthvllstpaldavftdleilaaifaaaihdvdhpgvs nqflintnselalmyndesvlenhhlavgfkllqeehcdifmnltkkqrqtlrkmvidmv latdmskhmslladlktmvetkkvtssgvllldnytdriqvlrnmvhcadlsnptkslel yrqwtdrimeeffqqgdkerergmeispmcdkhtasveksqvgfidyivhplwetwadlv qpdaqdildtlednrnwyqsmip