Biological Activity:Fully biologically active when compared to standard. The ED50 as determined by a chemotaxis bioassay using human CXCR2 transfected mouse BaF3 cells is less than 2 ng/ml, corresponding to a specific activity of > 5.0 × 105 IU/mg.
Purity:> 96 % by SDS-PAGE and HPLC analyses.
Formulation:Lyophilized from a 0.2 µm filtered concentrated solution in PBS, pH 7.4.