215-GM)." class="big_lightbox"> 215-GM)." alt="Measured by its ability to inhibit GM-CSF dependent proliferation of TF-1 human erythroleukemic cells. The ED₅₀ for this effect is 1.0-5.0 µg/mL in the presence of 40 pg/mL Recombinant Human GM-CSF (Catalog # 215-GM)." class="big_thumb" />