CD4 and cancer: The selective uptake of GalNAc-glycosylated antigens (Tn-antigens) by the common human and murine dendritic cell (DC) C-type lectin MGL, [19], [20] makes it possible to induce cancer specific glycopeptide antibodies in mice and man through induction of a CD4+ Th cells [11], [13], [14], [21].