Fusion protein amino acids 1-708 (full-length) of rat MMP9 (also known as matrix metalloproteinase 9, 92 kDa type IV collagenase, 92 kDa gelatinase, gelatinase B and GELB, accession number NP_112317) Human: 68% identity (482/708 amino acids identical) Mouse: 74% identity (548/731 amino acids identical) <50% identity with MMP2