title: Heat labile opsonins to Pneumococcus. 3. The participation of immunoglobulin and of the alternate pathway of C3 activation.
mesh_terms: D000818:Animals; D002473:Cell Wall; D003165:Complement System Proteins; D006168:Guinea Pigs; D006801:Humans; D007106:Immune Sera; D005779:Immunodiffusion; D007122:Immunoelectrophoresis; D007136:Immunoglobulins; D007962:Leukocytes / Q000276:immunology; D009895:Opsonin Proteins; D010587:Phagocytosis; D011817:Rabbits / Q000276:immunology; D013296:Streptococcus pneumoniae / Q000276:immunology*
chemical_list: D007106:Immune Sera; D007136:Immunoglobulins; D009895:Opsonin Proteins; D003165:Complement System Proteins