title: Initiation of antibody production to sheep erythrocytes in vitro: replacement of the requirement for T-cells with a cell-free factor isolated from cultures of lymphoid cells.
mesh_terms: D000818:Animals; D000917:Antibody Formation; D000921:Antibody-Producing Cells; D002474:Cell-Free System; D002478:Cells, Cultured; D004912:Erythrocytes / Q000276:immunology*; D066298:In Vitro Techniques; D051379:Mice; D008815:Mice, Inbred Strains; D012756:Sheep; D013154:Spleen / Q000166:cytology / Q000276:immunology*; D013347:Subcellular Fractions / Q000276:immunology*; D013950:Thymus Gland / Q000166:cytology / Q000276:immunology*