title: Helper function in Ambystoma: a comment.
mesh_terms: D000557:Ambystoma / Q000276:immunology*; D000558:Ambystoma mexicanum / Q000276:immunology*; D000818:Animals; D000917:Antibody Formation; D000961:Antilymphocyte Serum / Q000494:pharmacology; D001665:Binding Sites; D002645:Chickens; D012397:Rosette Formation; D013154:Spleen / Q000378:metabolism; D013601:T-Lymphocytes / Q000276:immunology*; D013934:Thymectomy; D013997:Time Factors; D014301:Trinitrobenzenes / Q000276:immunology
chemical_list: D000961:Antilymphocyte Serum; D014301:Trinitrobenzenes