Chains and heterogens:
PDB Chain Sequences:
>1sxrA (A:) gksrqrspancptiklkrqwggkpslglhyqvrpiryvvihhtvtgecsgllkcaeilqn mqayhqneldfndisynfligndgivyegtgwglrgahtygynaigtgiafignfvdklp sdaalqaakdllacgvqqgelsedyaliagsqvistqspgltlyneiqewphwlsnphhh hhh
>1sxrA (A:) cptiklkrqwggkpslglhyqvrpiryvvihhtvtgecsgllkcaeilqnmqayhqneld fndisynfligndgivyegtgwglrgahtygynaigtgiafignfvdklpsdaalqaakd llacgvqqgelsedyaliagsqvistqspgltlyneiqewphwlsnphhhhhh
>1sxrB (B:) gksrqrspancptiklkrqwggkpslglhyqvrpiryvvihhtvtgecsgllkcaeilqn mqayhqneldfndisynfligndgivyegtgwglrgahtygynaigtgiafignfvdklp sdaalqaakdllacgvqqgelsedyaliagsqvistqspgltlyneiqewphwlsnphhh hhh
>1sxrB (B:) cptiklkrqwggkpslglhyqvrpiryvvihhtvtgecsgllkcaeilqnmqayhqneld fndisynfligndgivyegtgwglrgahtygynaigtgiafignfvdklpsdaalqaakd llacgvqqgelsedyaliagsqvistqspgltlyneiqewphwlsnphhhhhh