Abstract: The present invention relates to an expression vector for the large scale production of a human or animal protein, which comprises a DNA construct consisting of operatively linked DNA coding for a plant promoter, a transcription terminator and the human or animal protein to be expressed. Such human or animal proteins may be selected from the group consisting of human protein C (HPC), factor VIII, growth hormone, erythropoietin, interleukin 1 to 7, colony stimulating factors, relaxins, polypeptide hormones, cytokines, growth factors and coagulation factors. The present invention also relates to the plant bioreactor and to the method for the large scale production of human or animal proteins.