Used in the development and testing of diagnostic assays for prostate-related conditions, particularly for detecting and quantifying Kallikrein 2 (KLK2) in biological samples. Plays a critical role in research aimed at understanding prostate cancer progression due to KLK2's association with tumor aggressiveness. Serves as a reference standard in immunoassays to ensure accuracy and consistency across different laboratories and testing platforms. Supports drug development efforts by enabling precise measurement of target engagement and biomarker response in clinical studies.