The human immunoglobulins (Ig) are the products of three unlinked sets of genes: the immunoglobulin heavy (IGH), the immunoglobulin kappa (IGK), and the immunoglobulin lambda (IGL) genes, localized on chromosome 14 (14q32.33), 2 (2p12), and 22 (22q11.2), respectively. This appendix presents tabulated lists of the human immunoglobulin heavy, kappa, and lambda genes named in accordance with the International ImMunoGeneTics database (IMGT) and approved by the Human Genome Organization (HUGO) Nomenclature Committee in 1999. Three additional tables list corresponding nomenclatures for these genes.