Chains and heterogens:
PDB Chain Sequences:
>3aig_ (-) nlpqryielvvvadrrvfmkynsdlniirtrvheivniinefyrslnirvsltdleiwsg qdfitiqssssntlnsfgewrervlltrkrhdnaqlltainfegkiigkaytssmcnprs svgivkdhspinllvavtmahelghnlgmehdgkdclrgaslcimrpgltpgrsyefsdd smgyyqkflnqykpqcilnkp