Chains and heterogens:
PDB Chain Sequences:
>1h6iA (A:) lfwravvaeflattlfvfisigsalgfkypvgnnqtavqdnvkvslafglsiatlaqsvg hisgahlnpavtlglllscqisifralmyiiaqcvgaivatailsgitssltgnslgrnd ladgvnsgqglgieiigtlqlvlcvlattdrrrrdlggsaplaiglsvalghllaidytg cginparsfgsavithnfsnhwifwvgpfiggalavliydfilap