murine splenocytes immunized in vitro against syngeneic adult kidney fibroblasts coupled sequentially with a glycylglycylcystamide spacer , and the p-nitrophenyl ester of muramyl dipeptide developed direct cell-mediated cytotoxicity to the immunizing cells which cross-reacted against syngeneic fibrosarcoma cells .
C0016030
fibroblasts
C0007634
cells