Chains and heterogens:
PDB Chain Sequences:
>1xelA (A:) mrvlvtggsgyigshtcvqllqnghdviildnlcnskrsvlpvierlggkhptfvegdir nealmteilhdhaidtvihfaglkavgesvqkpleyydnnvngtlrlisamraanvknfi fsssatvygdnpkipyvesfptgtpqspygksklmveqiltdlqkaqpdwsiallryfnp vgahpsgdmgedpqgipnnlmpyiaqvavgrrdslaifgndyptedgtgvrdyihvmdla dghvvameklankpgvhiynlgagvgnsvldvvnafskacgkpvnyhfaprregdlpayw adaskadrelnwrvtrtldemaqdtwhwqsrhpqgypd