Publisher Summary New markers, especially enzymes or isoenzymes, have proved useful
for the detection of preneoplastic lesions in various organs of both animals and man. In
addition, the description of preneoplastic marker enzymes has also played an important role
in characterizing the metabolic patterns of preneoplastic cells, thus providing insights that
have facilitated the analysis of carcinogenic processes. Recently, certain molecular forms of
glutathione transferase (GT), one of the most important drug-metabolizing enzymes, have …