Greater than 85.0% as determined by SDS-PAGE. MMP-9 Rabbit Recombinant is a full length secreted protein (688 amino acids - a.a. 20-707). The MMP-9 is expressed in insect cells and fused to a 30 aa C-terminal Myc-His tag, having a total MW of 79.94kDa. Purified MMP9 protein appears at 95kDa on SDS-PAGE gel due to protein modification. The MMP-9 solution (0.3mg/ml) contains 50mM Tris, 150mM NaCl, 10% Glycerol, pH 7.5.