This invention concerns the International ImMunoGeneTics information system® (IMGT) which was created in 1989 and comprises high quality integrated databases and tools specialized in immunoglobulins (IG), T cell receptors (TR) and major histocompatibility complex (MHC) of human and other vertebrate species, and in related proteins of the immune system, that belong to the immunoglobulin superfamily (IgSF) and to the MHC superfamily (MhcSF).