these proliferative responses were completely reconstituted by small numbers of syngeneic or allogeneic peritoneal cells , purified peritoneal macrophages or cells from tertiary cultures of mouse embryo 'fibroblasts ' , but not by 3t3 cells , p815 mastocytoma cells or nulli scc-1 embryonal carcinoma cells , or by 2-mercaptoethanol .
C0016030
cells
C0007634
cells