title: Antigenic difference between cell strains HeLa and ERK-1.
mesh_terms: D000941:Antigens / Q000032:analysis*; D002965:Classification; D046508:Culture Techniques; D006367:HeLa Cells; D006801:Humans; D007106:Immune Sera; D005779:Immunodiffusion
chemical_list: D000941:Antigens; D007106:Immune Sera