Chains and heterogens:
PDB Chain Sequences:
>1e2qA (A:) rrgalivlegvdragkstqsrklvealcaaghraellrfpersteigkllssylqkksdv edhsvhllfsanrweqvplikeklsqgvtlvvdryafsgvaftgakenfsldwckqpdvg lpkpdlvlflqlqladaakrgafgheryengafqeralrcfhqlmkdttlnwkmvdasks ieavhedirvlsedaiatatekplgelwk