title: Helper function in antibody synthesis medicated by soluble factor(s).
mesh_terms: D000818:Animals; D000917:Antibody Formation; D000921:Antibody-Producing Cells; D002474:Cell-Free System; D004912:Erythrocytes / Q000276:immunology; D006462:Hemolytic Plaque Technique; D007106:Immune Sera; D007114:Immunization; D051379:Mice; D008810:Mice, Inbred C57BL; D008808:Mice, Inbred CBA; D012756:Sheep / Q000276:immunology; D013154:Spleen / Q000166:cytology / Q000276:immunology*; D013601:T-Lymphocytes / Q000276:immunology
chemical_list: D007106:Immune Sera