Chains and heterogens:
PDB Chain Sequences:
>1sz2A (A:) mgsshhhhhhgstkyalvgdvggtnarlalcdiasgeisqaktysgldypsleavirvyl eehkvevkdgciaiacpitgdwvamtnhtwafsiaemkknlgfshleiindftavsmaip mlkkehliqfggaepvegkpiavygagtglgvahlvhvdkrwvslpgegghvdfapnsee eaiileilraeighvsaervlsgpglvnlyraivkadnrlpenlkpkditeraladsctd crralslfcvimgrfggnlalnlgtfggvfiaggivprfleffkasgfraafedkgrfke yvhdipvylivhdnpgllgsgahlrqtlghil
>1sz2A (A:) kyalvgdvggtnarlalcdiasgeisqaktysgldypsleavirvyleehkvevkdgcia iacpitgdwvamtnhtwafsiaemkknlgfshleiindftavsmaipmlkkehliqfgga epvegkpiavygagtglgvahlvhvdkrwvslpgegghvdfapnseeeaiileilraeig hvsaervlsgpglvnlyraivkadnrlpenlkpkditeraladsctdcrralslfcvimg rfggnlalnlgtfggvfiaggivprfleffkasgfraafedkgrfkeyvhdipvylivhd npgllgsgahlrqtlghil
>1sz2B (B:) mgsshhhhhhgstkyalvgdvggtnarlalcdiasgeisqaktysgldypsleavirvyl eehkvevkdgciaiacpitgdwvamtnhtwafsiaemkknlgfshleiindftavsmaip mlkkehliqfggaepvegkpiavygagtglgvahlvhvdkrwvslpgegghvdfapnsee eaiileilraeighvsaervlsgpglvnlyraivkadnrlpenlkpkditeraladsctd crralslfcvimgrfggnlalnlgtfggvfiaggivprfleffkasgfraafedkgrfke yvhdipvylivhdnpgllgsgahlrqtlghil
>1sz2B (B:) tkyalvgdvggtnarlalcdiasgeisqaktysgldypsleavirvyleehkvevkdgci aiacpitgdwvamtnhtwafsiaemkknlgfshleiindftavsmaipmlkkehliqfgg aepvegkpiavygagtglgvahlvhvdkrwvslpgegghvdfapnseeeaiileilraei ghvsaervlsgpglvnlyraivkadnrlpenlkpkditeraladsctdcrralslfcvim grfggnlalnlgtfggvfiaggivprfleffkasgfraafedkgrfkeyvhdipvylivh dnpgllgsgahlrqtlghil