Leukemic content in bone marrow and spleens.

End-point determinations of leukemic levels in bone marrow and spleens are shown for mice engrafted with SK leukemia (left) or OF leukemia (right) treated with anti-SK or anti-OF CTLs or control injections. Engraftment levels are expressed as the percentage leukemic cells of all nucleated cells in the bone marrow or spleen cell suspensions. Each bar represents the mean of 4 to 8 mice. The asterisk represents statistically significant differences (P ≤ .05).