Jurkat cells: response to anti‐FAS mAb (monoclonal antibody) (ninefold increased uptake) is blocked by Z‐valine‐alanine‐DL‐aspartate‐fluoromethyl ketone and specific for cells involved in apoptosis.392 Colorectal tumor model with inbuilt doxocyclin‐induced “death switch”: strong apoptotic response clearly visible.52 [123I]ML‐10 is rapidly degraded in living animals.393. Here, FAS is linked to colorectal neoplasm.