NCIt synonyms : Tetraspanin-28; Tspan-28; 26 kDa Cell Surface Protein TAPA-1; Target Of The Antiproliferative Antibody 1;
NCIt definition : CD81 antigen (236 aa, 26 kDa) is encoded by the human CD81 gene. This protein is
involved in the regulation of the immune response and can promote Hepatitis C infection
by binding to viral envelope proteins..;