1.1.1.334 flower less than 20% of activity compared to young leaves 718331 1.1.1.334 leaf highest activity in young leaves 718331 1.1.1.334 mesophyll of young leaves 718331 1.1.1.334 additional information no activity in mature leaves or in roots 718331 1.1.1.334 seed - 718331 1.1.1.334 stem less than 20% of activity compared to young leaves 718331