[Adenosine deaminase activity in hepatomas of varying degrees of malignancy]

In highly malignant Gelshtein 22A hepatcma and ascites Ehrlich carcinoma adenosine deaminase activity was found to be reduced 3-fold as compared with that of the normal mouse liver. In less malignant hepatomas adenosine deaminase activity drops only by 20%. A certain reduction of adenosine deaminase activity was also noted in the liver to tumour-bearing mice.