Figure 3.
Deletion of the PSI Results in the Redirection of Phytepsin to the Apoplast.
In situ localization of PhytepsinΔPSI (A) and wild-type Phytepsin (B) in roots from transgenic tobacco plants using immunogold electron microscopy. Note the apoplastic localization of electron-dense material labeled with Phytepsin antibodies in plants producing PhytepsinΔPSI. The intracellular spaces of wild-type Phytepsin–producing plants contain neither electron-dense material nor gold labeling.