Consequences of the direct interaction of helper T cells with B cells presenting antigen.
D000938:Antigen-Presenting Cells / Q000276:immunology*; D001402:B-Lymphocytes / Q000276:immunology; D008211:Lymphocyte Cooperation; D011971:Receptors, Immunologic / Q000276:immunology; D006377:T-Lymphocytes, Helper-Inducer / Q000276:immunology*
D011971:Receptors, Immunologic