title: Induction of B lymphocytes by helper T cells: requirement of direct cell contact.
mesh_terms: D000818:Animals; D001402:B-Lymphocytes / Q000166:cytology / Q000276:immunology*; D002450:Cell Communication; D008954:Models, Biological; D006377:T-Lymphocytes, Helper-Inducer / Q000166:cytology / Q000276:immunology*