Used to measure the activity of KLKB1 (kallikrein B1) in mouse biological samples such as plasma, serum, or tissue extracts. This ELISA kit enables researchers to quantify KLKB1 levels in studies related to inflammation, coagulation, and vascular permeability. It is particularly useful in preclinical research involving mouse models of sepsis, angioedema, or cardiovascular diseases where the kinin-kallikrein system plays a key role. The assay provides a sensitive and specific way to monitor changes in KLKB1 activity under experimental conditions, supporting mechanistic studies and evaluation of therapeutic interventions.