Abstract
The manner in which a single dose of radioactive P is handled over a period of 7 days by the tissues of 50 normal and 50 leukemic mice was detd. Leukemic infiltration is accompanied by an increase of several-fold in the uptake and retention of radioactive P by the nucleoprotein and acid-soluble fractions of liver, spleen and lymph nodes. The phospholipid metabolism of spleen and lymph nodes is affected to only a limited extent by leukemic infiltration, while that of liver is depressed only during the 1st day after the adm. The whole body retention of P administered to leukemic mice is higher than that of normal mice.