Chains and heterogens:
PDB Chain Sequences:
>4aig_ (-) nlpqryielvvvadrrvfmkynsdlniirtrvheivniinefyrslnirvsltdleiwsg qdfitiqssssntlnsfgewrervlltrkrhdnaqlltainfegkiigkaytssmcnprs svgivkdhspinllvavtmahelghnlgmehdgkdclrgaslcimrpgltpgrsyefsdd smgyyqkflnqykpqcilnkp