Chains and heterogens:
PDB Chain Sequences:
>1e3gA (A:) cqpiflnvleaiepgvvcaghdnnqpdsfaallsslnelgerqlvhvvkwakalpgfrnl hvddqmaviqyswmglmvfamgwrsftnvnsrmlyfapdlvfneyrmhksrmysqcvrmr hlsqefgwlqitpqeflcmkalllfsiipvdglknqkffdelrmnyikeldriiackrkn ptscsrrfyqltklldsvqpiarelhqftfdllikshmvsvdfpemmaeiisvqvpkils gkvkpiyfht