Chains and heterogens:
PDB Chain Sequences:
>1e2fA (A:) arrgalivlegvdragkstqsrklvealcaaghraellrfpersteigkllssylqkksd vedhsvhllfsanrweqvplikeklsqgvtlvvdryafsgvaftgakenfsldwckqpdv glpkpdlvlflqlqladaakrgafgheryengafqeralrcfhqlmkdttlnwkmvdask sieavhedirvlsedaiatatekplgelwk