Chains and heterogens:
PDB Chain Sequences:
>1e99A (A:) rrgalivlegvdragkstqsrklvealcaaghraellrfpersteigkllssylqkksdv edhsvhllfsanrweqvplikeklsqgvtlvvdryafsgvaftgakenfsldwckqpdvg lpkpdlvlflqlqladaakrgafgheryengafqeralrcfhqlmkdttlnwkmvdasks ieavhedirvlsedaiatatekplgelwk