Isoperoxidase of mature leaf of 41 varieties or strains from Chinese Chestnut and Japanese Chestnut was examined by polyacrylamide gel plate electrophoresis.The result indicated that the isoperoxidase of the varieties or strains in chestnut could be divided into 2 regions. In the first region of slow mobility, the zone of Rf value was from 0.056 to 0.272.Six isoperoxidase bands were distributed within this region.In the second region of fast mobility, Rf value was from 0.478 to 0.647.Eight isoperoxidase ban...