Chains and heterogens:
PDB Chain Sequences:
>1sz3A (A:) mehderthvpvelraagvvllnergdillvqekgipghpekaglwhipsgavedgenpqd aavreaceetglrvrpvkflgaylgrfpdgvlilrhvwlaepepgqtlapaftdeiaeas fvsredfaqlyaagqirmyqtklfyadalrekgfpalpv
>1sz3A (A:) mehderthvpvelraagvvllnergdillvqekgipekaglwhipsgavedgenpqdaav reaceetglrvrpvkflgaylgrfpdgvlilrhvwlaepepgqtlapaftdeiaeasfvs redfaqlyaagqirmyqtklfyadalrekgfpalp
>1sz3B (B:) mehderthvpvelraagvvllnergdillvqekgipghpekaglwhipsgavedgenpqd aavreaceetglrvrpvkflgaylgrfpdgvlilrhvwlaepepgqtlapaftdeiaeas fvsredfaqlyaagqirmyqtklfyadalrekgfpalpv
>1sz3B (B:) mehderthvpvelraagvvllnergdillvqekgipekaglwhipsgavedgenpqdaav reaceetglrvrpvkflgaylgrfpdgvlilrhvwlaepepgqtlapaftdeiaeasfvs redfaqlyaagqirmyqtklfyadalrekgfpalp