Used in biomedical research to quantify latent transforming growth factor-beta 1 (TGF-β1) in human biological samples such as serum, plasma, and cell culture supernatants. It plays a critical role in studying immune regulation, inflammation, fibrosis, and cancer progression, where TGF-β1 signaling is involved. The kit enables researchers to assess the activation status of TGF-β1 in disease models and therapeutic development, particularly in monitoring responses to treatments targeting the TGF-β pathway. Its high specificity allows differentiation between latent and active forms, supporting accurate analysis in clinical and experimental settings.