The IMGT/HLA database (www.ebi.ac.uk/imgt/hla) has provided a centralized repository for the sequences of the alleles named by the WHO Nomenclature Committee for Factors of the HLA System since 1998. Since its initial release, the database has rapidly grown in size and is recognized as the primary source of information for the study of sequences of the human major histocompatibility complex. The Immuno Polymorphism Database (IPD; www.ebi.ac.uk/ipd) is a set of specialist databases related to the study of polymorphic genes in the immune system. The IPD currently consists of four databases: IPD-KIR contains the allelic sequences of killer-cell immunoglobulin-like receptors; IPD-MHC is a database of sequences of the major histocompatibility complex of different species; IPD-HPA contains alloantigens expressed only on platelets (human platelet antigens or HPA); and IPD-ESTDAB provides access to the European Searchable Tumour Cell-Line Database, a cell bank of immunologically characterized melanoma cell lines.
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