Different plant species, such as tobacco and corn are used as bioreactors for the production of recombinant enzymes, antibodies, vaccines or other substitutive proteins of therapeutic interest. Expression cassettes are thereby carefully adapted to obtain high level expression of correctly processed functional protein in a given host plant organ. Extraction and purification processes are developed in our industrial pilot plant to produce large quantities of recombinant proteins from field grown transgenic plants. New rapid production methods for recombinant proteins at the mg to gram level have recently been developed, that allow the efficient screening of proteins as potential drug candidates for pharmaceutical applications. As an illustration data will be presented for the production of several recombinant proteins such as gastric lipase for the treatment of exocrine pancreatic insufficiencies. medicinefarms.com