Chains and heterogens:
PDB Chain Sequences:
>1q18A (A:) mgsshhhhhhgstkyalvgdvggtnarlalcdiasgeisqaktysgldypsleavirvyl eehkvevkdgciaiacpitgdwvamtnhtwafsiaemkknlgfshleiindftavsmaip mlkkehliqfggaepvegkpiavygagtglgvahlvhvdkrwvslpgegghvdfapnsee eaiileilraeighvsaervlsgpglvnlyraivkadnrlpenlkpkditeraladsctd crralslfcvimgrfggnlalnlgtfggvfiaggivprfleffkasgfraafedkgrfke yvhdipvylivhdnpgllgsgahlrqtlghil
>1q18A (A:) tkyalvgdvggtnarlalcdiasgeisqaktysgldypsleavirvyleehkvevkdgci aiacpitgdwvamtnhtwafsiaemkknlgfshleiindftavsmaipmlkkehliqfgg aepvegkpiavygagtglgvahlvhvdkrwvslpgegghvdfapnseeeaiileilraei ghvsaervlsgpglvnlyraivkadnrlpenlkpkditeraladsctdcrralslfcvim grfggnlalnlgtfggvfiaggivprfleffkasgfraafedkgrfkeyvhdipvylivh dnpgllgsgahlrqtlghil
>1q18B (B:) mgsshhhhhhgstkyalvgdvggtnarlalcdiasgeisqaktysgldypsleavirvyl eehkvevkdgciaiacpitgdwvamtnhtwafsiaemkknlgfshleiindftavsmaip mlkkehliqfggaepvegkpiavygagtglgvahlvhvdkrwvslpgegghvdfapnsee eaiileilraeighvsaervlsgpglvnlyraivkadnrlpenlkpkditeraladsctd crralslfcvimgrfggnlalnlgtfggvfiaggivprfleffkasgfraafedkgrfke yvhdipvylivhdnpgllgsgahlrqtlghil
>1q18B (B:) tkyalvgdvggtnarlalcdiasgeisqaktysgldypsleavirvyleehkvevkdgci aiacpitgdwvamtnhtwafsiaemkknlgfshleiindftavsmaipmlkkehliqfgg aepvegkpiavygagtglgvahlvhvdkrwvslpgegghvdfapnseeeaiileilraei ghvsaervlsgpglvnlyraivkadnrlpenlkpkditeraladsctdcrralslfcvim grfggnlalnlgtfggvfiaggivprfleffkasgfraafedkgrfkeyvhdipvylivh dnpgllgsgahlrqtlghil