Chains and heterogens:
PDB Chain Sequences:
>1f2cA (A:) apaavdwrargavtavkdqgqcgscwafsaignvecqwflaghpltnlseqmlvscdktd sgcsgglmnnafewivqenngavytedsypyasgegisppcttsghtvgatitghvelpq deaqiaawlavngpvavavdasswmtytggvmtscvseqldhgvllvgyndsaavpywii knswttqwgeegyiriakgsnqclvkeeassavvg