Ready-to-use ELISA kits are available for the detection of B/MMP9, an alias of the protein, matrix metallopeptidase 9. The official gene symbol is MMP9. The kits can detect several species variants of the protein, including: human, mouse, and primate. The protein, with a mass of 78.5 kDa and length of 707 residues, is reported to be secreted. It is a member of the Peptidase M10A family and may be known by other names, including: GELB, CLG4B, matrix metalloproteinase 9 (gelatinase B 92kDa gelatinase 92kDa type IV collagenase), macrophage gelatinase, and matrix metalloproteinase-9, and MMP-9.