Two cDNAs (MdPAO1 and MdPAO2a) encoding polyamine oxidases (PAOs) were isolated from apple. Some notable features related to substrate specificity, catalytic activity and localization of MdPAO were predicted by comparison with those of other dicots- and monocots-PAOs. MdPAO was expressed in suspension cells at any time points tested during the culture period, but only in the young fruits among several organs analyzed.
- Malus sylvestris var. domestica
- Polyamine oxidase