Matrix metalloproteinases (MMPs) belong to a family of secreted or membrane-associated proteins capable of digesting extracellular matrix components. They are involved in diseases such as cancer, arthritis, asthma, angiogenesis, alopecia and metastasis. They are also identified as drug-screening targets. SensoLyteŽ 520 MMP Substrate Sampler Kit contains a series of FRET peptide substrates for use as fluorogenic indicators to assay MMP protease activities. It provides the best solution for identifying a suitable fluorogenic substrate for a particular MMP assay. All the MMP substrates in the kit are also available in bulk packages.