Chains and heterogens:
PDB Chain Sequences:
>1e9cA (A:) rrgalivlegvdragkstqsrklvealcaaghraellrfpersteigkllssylqkksdv edhsvhllfsanrweqvplikeklsqgvtlvvdryafsgvaytgakenfsldwckqpdvg lpkpdlvlflqlqladaakrgafgheryengafqeralrcfhqlmkdttlnwkmvdasks ieavhedirvlsedaiatatekplkelwk