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IMGT flat file downloading is free of charge for public institutions and depends on an agreement with CNRS for private companies.
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Note: from September 2000, IMGT/LIGM-DB flat file releases are numbered as YYYYWW-D where YYYY is the number of the year, WW is the number of the week within the year, and D is the number of the day within the week. IMGT/LIGM-DB flat file releases are weekly updated.

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IMGT/HLA-DB flat file release information