“…Peyer's patch lymphocytes have higher levels of NC activity than either spleen or peripheral lymph node lymphocytes (Tagliabue et al, 1983(Tagliabue et al, /1984). Peyer's patch lymphocytes obtained from conventionally reared mice also were found to contain a population of novel naturally cytotoxic effector cells that have been termed natural cytotoxic T cells (NCTC) (Gautam et al, 1986). NCTC effector cells were able to lyse a wide variety of syngeneic and allogeneic tumor cell lines as well as syngeneic or allogeneic Con A-induced T lymphoblasts.…”