Chains and heterogens:
PDB Chain Sequences:
>1sh6A (A:) gshmefderdrvqkktftkwvnkhlikhwraeaqrhisdlyedlrdghnlisllevlsgd slprekgrmrfhklqnvqialdylrhrqvklvnirnddiadgnpkltlgliwtiilhfqi sdiqvsgqsedmtakeklllwsqrmvegyqglrcdnfttswrdgrlfnaiihrhkpmlid mnkvyrqtnlenldqafsvaerdlgvtrlldpedvdvpqpdeksiityvsslydamprvp gaqef
>1sh6A (A:) erdrvqkktftkwvnkhlikhwraeaqrhisdlyedlrdghnlisllevlsgdslprekg rmrfhklqnvqialdylrhrqvklvnirnddiadgnpkltlgliwtiilhfqisdiqvsg qsedmtakeklllwsqrmvegyqglrcdnfttswrdgrlfnaiihrhkpmlidmnkvyrq tnlenldqafsvaerdlgvtrlldpedvdvpqpdeksiityvsslydamp