title: Chromosomal localization of the gene for human B-cell antigen CD40.
abstract: CD40 is a surface glycoprotein expressed on all human B lymphocytes and plays an important role in B-cell development, growth, and differentiation. Anti-CD40 monoclonal antibodies cause isotype switching in B cells treated with IL-4. CD40 is a member of a family of proteins that include low-affinity nerve growth factor receptor, TNF receptor, and the antigen Fas. The ligand for CD40 had been recently identified and has been assigned to the X chromosome. Using a panel of human-rodent somatic cell hybrids, we now show that CD40 maps to human chromosome 20.
authors.affiliation: Division of Immunology, Children's Hospital, Boston, Massachusetts.
authors.forename: N
authors.initials: N
authors.lastname: Ramesh
authors.forename: V
authors.initials: V
authors.lastname: Ramesh
authors.forename: J F
authors.initials: JF
authors.lastname: Gusella
authors.forename: R
authors.initials: R
authors.lastname: Geha
mesh_terms: D000818:Animals; D015703:Antigens, CD / Q000235:genetics*; D000944:Antigens, Differentiation, B-Lymphocyte / Q000235:genetics*; D001402:B-Lymphocytes / Q000276:immunology; D001483:Base Sequence; D019013:CD40 Antigens; D002874:Chromosome Mapping; D002890:Chromosomes, Human, Pair 20; D004277:DNA, Single-Stranded; D006801:Humans; D006822:Hybrid Cells; D008969:Molecular Sequence Data; D016133:Polymerase Chain Reaction; D012377:Rodentia
chemical_list: D015703:Antigens, CD; D000944:Antigens, Differentiation, B-Lymphocyte; D019013:CD40 Antigens; D004277:DNA, Single-Stranded