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<http://linkedlifedata.com/resource/pubmed/xref/PDB/P17981> <http://linkedlifedata.com/resource/pubmed/databankName> "PDB" .
<http://linkedlifedata.com/resource/pubmed/xref/PDB/P17981> <http://linkedlifedata.com/resource/pubmed/databankAccession> "P17981" .