Fig. 2

Advantages and disadvantages of different recombinant expressions systems to produce HDPs [52, 108,109,110]. Only the most utilized systems are shown, as there are very few instances where mammalian cells have been used for recombinant HDP production, as it is probably too expensive and unnecessary in many cases. The bulk of the work with plant systems is based on transgenic plants to enhance their properties with genetic modifications, but not necessarily recombinant HDP production per se