The SensoLyte® Green Protease Assay Kit is widely used for detection of generic protease activities. The kit uses a casein derivative that is heavily labeled with a rhodamine derivative, resulting in almost total quenching of the conjugate's fluorescence. Protease-catalyzed hydrolysis relieves this quenching conjugate, yielding brightly green fluorescent dye-labeled peptides. The increase in fluorescence intensity is directly proportional to protease activity (Ex/Em=488/520 nm). The SensoLyte® protease assay kits do not require any separation steps and can be used to continuously measure the kinetics of a variety of exopeptidases and endopeptidases.