[Localization in the HLA complex of a gene coding for the B lymphocyte system, Ly-Li].

Differentiation antigens can be detected on human B lymphocytes using allo-antibodies. They probably correspond to Mouse Ia antigens. The study of two families with cross-overs between the HLA-B and D loci has shown that one of these B lymphocyte antigens (Ly-Li) is coded by a gene very close (or identical) to the HLA-D locus.