Chains and heterogens:
PDB Chain Sequences:
>1kegH (H:) evqlqqsgtvlarpgasvkmsckasgysftsfwmhwvkqrpgqglewigtiypgnsdtsy nqkfkgkakltavtsastaymevssltnedsavyyctrrsgykyyaldywgqgtsvtvss akttapsvyplapvcgdttgssvtlgclvkgyfpepvtltwnsgslssgvhtfpavlqsd lytlsssvtvtsstwpsqsitcnvahpasstkvdkkiepr
>1kegH (H:) evqlqqsgtvlarpgasvkmsckasgysftsfwmhwvkqrpgqglewigtiypgnsdtsy nqkfkgkakltavtsastaymevssltnedsavyyctrrsgykyyaldywgqgtsvtvss akttapsvyplapvcgssvtlgclvkgyfpepvtltwnsgslssgvhtfpavlqsdlytl sssvtvtsstwpsqsitcnvahpasstkvdkkiepr
>1kegL (L:) dvlmtqtplslpvslgdqasiscrssqsivhsngntylewylqkpgqspklliykvsnrf sgvpdrfsgsgsgtdftlkisrveaedlgvyycfqgslvptfgggtkleikradaaptvs ifppsseqltsggasvvcflnnfypkdinvkwkidgserqngvlnswtdqdskdstysms stltltkdeyerhnsytceathktstspivksfnrn