Research ' "N. benthamiana is a perfect plant for the process of agroinfiltration. The desired antibody gene is added as a DNA fragment to an engineered bacterium called Agrobacterium tumefaciens. This was once the source of crown gall disease in plants. Now it has been harnessed to saturate a plant with useful DNA. Plants are dipped whole into a solution of A. Tumefaciens and the leaves absorb the bacteria. Then, the plantsí hijacked manufacturing centers begin producing the desired protein in bulk...
"Tobacco and its cousins contain toxic alkaloids that have to be removed before the protein can be administered as a drug." (Removal to what %?)