CovaLink Modules are strips of 8 flat-bottom, optically clear, polystyrene wells, developed for covalent binding of proteins, peptides, DNA, carbohydrates and other molecules. Covalent binding has the following advantages over passive absorption: high binding strength, binding of distinct functional groups and specific orientation of molecules and improved stability. The 96 well format allows use of standard laboratory equipment and familiar assay techniques. Nunc's patented technology grafts a spacer arm terminated with a secondary amino group to polystyrene. Antigens, antibodies, enzymes and nucleic acid probes may be oriented from specific interaction. 400 µl wells.