Abstract
The in vitro dehydrogenase activity of liver and kidney slices from female control and tumor mice of the CFW, C3H, DBA, and A strains was detd. and the relative intensity of the kidney to liver values (K/L ratio) was calculated. The K/L ratio was found to be maintained within a narrow range in the different control groups. In the CFW and A mice this value was shifted to a lower value in the presence of a tumor. Such a change occurred to a lesser degree in DBA mice and not at all in the C3H mice.