Mf. Barnes, LEAF PEROXIDASE AND CATECHOL OXIDASE POLYMORPHISM AND THE IDENTIFICATION OF COMMERCIAL APPLE VARIETIES, New Zealand journal of crop and horticultural science, 21(2), 1993, pp. 207-210
Isozyme electrophoresis, using polyacrylamide acrylamide gradient gel
electrophoresis has been applied to leaf extracts from 12 commercial a
pple varieties. The oxidative enzymes peroxidase and catechol oxidase
show sufficient polymorphism to allow unique identification of most of
the varieties tested.