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An unknown 'antigen' is found in this site in crystals of purified HLA-A2.","bibjson":{"author":[{"initials":"PJ","lastname":"Bjorkman","name":"Bjorkman PJ"},{"initials":"MA","lastname":"Saper","name":"Saper MA"},{"initials":"B","lastname":"Samraoui","name":"Samraoui B"},{"initials":"WS","lastname":"Bennett","name":"Bennett WS"},{"initials":"JL","lastname":"Strominger","name":"Strominger JL"},{"initials":"DC","lastname":"Wiley","name":"Wiley DC"}],"identifier":[{"id":"10.1038/329506a0","type":"doi"},{"id":"3309677","type":"pubmed"}],"issue":["6139"],"journal":{"iso_abbreviation":"Nature","name":""},"pages":["506-12"],"title":"Structure of the human class I histocompatibility antigen, HLA-A2.","type":"article","url":"http://www.nature.com/articles/329506a0","volume":["329"],"year":[null]},"in_pmc":"N","in_pmce":"N","open_access":"N"},"resolution":"3.50","same_as":{"pdbe":{"url":"https://www.ebi.ac.uk/pdbe/entry/pdb/1hla"},"rcsb":{"url":"https://www.rcsb.org/structure/1hla"}},"species":{"common_name":"Human","match_type":"histo:assign_species","scientific_name":"Homo sapiens","slug":"homo_sapiens"},"tcr":null,"title":"HLA-A*02:01 possibly without \"peptide\" at 3.50Å resolution","unique_chain_count":2}}