we have found that a 4 day incubation of prothymocytes ( derived from the spleens of nu/nu mice ) with natural and recombinant interleukin-2 in the presence of human thymic epithelial cells results in their synergistic effect on prothymocyte differentiation as measured by thy 1.2 induction using a fluorescence activated cell sorter ( facs ) .
C0021756
recombinant
C0086418
human