The NEK9 protein is a pleiotropic mitotic regulator that oversees spindle dynamics and chromosome segregation. It phosphorylates a variety of substrates, including histones, myelin basic protein, β-casein, and BICD2. NEK9 Protein, Human (sf9, GST) is the recombinant human-derived NEK9 protein, expressed by sf9 insect cells , with N-GST labeled tag.