NHS-Activated Beads 4FF is a pre-activated agarose beads that increases the choice of coupling chemistries available. NHS coupling forms a chemically stable amide bone with ligands containing primary amino groups. NHS-Activated Beads 4FF can be used to prepare affinity adsorbents which can isolate specific substances from complex mixtures, often achieving very high purity in a single step. NHS-Activated Beads 4FF fulfills industrial demands for security of supply and robust performance.