R+D Systems (a Bio-Techne brand) is producing and marketing a wide range of human cytokines through genetic engineering since the mid1980’s. Recombinant DNA technology offers several advantages over extraction of these proteins from natural sources, including lower production cost and potentially unlimited supply. Since 30 years R+D Systems is further developing monoclonal and polyclonal antibodies to cytokines as well as ELISA kits and as become one of the leading suppliers worldwide for these products. Lucerna-Chem enables convenient domestic orders for all customers in Switzerland.