since il-2 is a product of helper t ( th ) cells secreted upon activation by antigen recognized in context of self h-2 and is known to stimulate antigen-activated cytotoxic t-lymphocyte precursors ( ctl-p ) non-specifically to effector ctl function , the results indicate that accessory cells interact in an h-2 restricted fashion with helper rather than cytotoxic t-lymphocyte precursors .
C0007634
cells
C1327616
secreted