Selectivity by Expression of Phosphinothricin Acetyl Transferase

2 Crop Selectivity by Expression of Phosphinothricin Acetyl Transferase 

Owing to the high substrate affinity of both enzymes, trace amounts of the proteins are sufficient to protect the transgenic plants from herbicidal damage. Even if less than 0.1% of the total protein consists of Bar or Pat protein, the respective plants efficiently acetylate phosphinothricin quantitatively when it enters the plant cells. These plants do not show any signs of GS inhibition even after application of high doses of glufosinate, which exceed the field application rate 5-10- 

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