Chains and heterogens:
PDB Chain Sequences:
>1xf3A (A:) elqmtqspaslsasvgetvtitcraseniysylawyqqkqgkspqllvynaktlaegvps rfsgsgsgtqfslkinslqpedfgsyycqhhygtpltfgagtklelkradaaptvsifpp sseqltsggasvvcflnnfypkdinvkwkidgserqngvlnswtdqdskdstysmsstlt ltkdeyerhnsytceathktstspivksfnrnec
>1xf3A (A:) elqmtqspaslsasvgetvtitcraseniysylawyqqkqgkspqllvynaktlaegvps rfsgsgsgtqfslkinslqpedfgsyycqhhygtpltfgagtklelkradaaptvsifpp sseqltsggasvvcflnnfypkdinvkwkidgserqngvlnswtdqdskdstysmsstlt ltkdeyerhnsytceathktstspivksfnrne
>1xf3B (B:) qvkllesgpelvkpgasvkmsckasgytftsyvmhwvkqkpgqglewigyinpyndgtky nekfkgkatltsdkssstaymelssltsedsavyycvrggyrpyyamdywgqgtsvtvss akttppsvyplapgsaaqtnsmvtlgclvkgyfpepvtvtwnsgslssgvhtfpavlqsd lytlsssvtvpsstwpsetvtcnvahpasstkvdkkivprdctshhhhhh
>1xf3B (B:) qvkllesgpelvkpgasvkmsckasgytftsyvmhwvkqkpgqglewigyinpyndgtky nekfkgkatltsdkssstaymelssltsedsavyycvrggyrpyyamdywgqgtsvtvss akttppsvyplapgsasmvtlgclvkgyfpepvtvtwnsgslssgvhtfpavlqsdlytl sssvtvpsstwpsetvtcnvahpasstkvdkkivprdc
>1xf3H (H:) qvkllesgpelvkpgasvkmsckasgytftsyvmhwvkqkpgqglewigyinpyndgtky nekfkgkatltsdkssstaymelssltsedsavyycvrggyrpyyamdywgqgtsvtvss akttppsvyplapgsaaqtnsmvtlgclvkgyfpepvtvtwnsgslssgvhtfpavlqsd lytlsssvtvpsstwpsetvtcnvahpasstkvdkkivprdctshhhhhh
>1xf3H (H:) kllesgpelvkpgasvkmsckasgytftsyvmhwvkqkpgqglewigyinpyndgtkyne kfkgkatltsdkssstaymelssltsedsavyycvrggyrpyyamdywgqgtsvtvssak ttppsvyplapgsnsmvtlgclvkgyfpepvtvtwnsgslssgvhtfpavlqsdlytlss svtvpsstwpsetvtcnvahpasstkvdkkivprdc
>1xf3L (L:) elqmtqspaslsasvgetvtitcraseniysylawyqqkqgkspqllvynaktlaegvps rfsgsgsgtqfslkinslqpedfgsyycqhhygtpltfgagtklelkradaaptvsifpp sseqltsggasvvcflnnfypkdinvkwkidgserqngvlnswtdqdskdstysmsstlt ltkdeyerhnsytceathktstspivksfnrnec
>1xf3L (L:) elqmtqspaslsasvgetvtitcraseniysylawyqqkqgkspqllvynaktlaegvps rfsgsgsgtqfslkinslqpedfgsyycqhhygtpltfgagtklelkradaaptvsifpp sseqltsggasvvcflnnfypkdinvkwkidgserqngvlnswtdqdskdstysmsstlt ltkdeyerhnsytceathktstspivksfnrne