Labeling of Murine Mastocytoma Cells in Vitro with Plasma Tritiated Thymidine-labeled Animals

40 min after injecting tritiated thymidine into an animal, 20-30% of the total plasma radioactivity is nonvolatile. This fraction decreases to about 6% 10 hr after the injection and 3% 24 hr after the injection. There appears to be material in this nonvolatile fraction that can label mastocytoma cells in culture. The labeling indices decrease with time… CONTINUE READING