- HyCult Biotechnology b.v. for antibodies and assays for Endotoxin & other Microbial toxins; TLR; Cell and Tissue damage research; Cytokine and Chemokine studies. HyCult Biotechnology b.v. also known as Hbt, is based in Uden, the Netherlands. The company produces recombinant proteins, monoclonal and polyclonal antibodies and ELISA kits for research laboratories engaged in innate immunity, endo ...www.hbt.nl