Used to measure levels of transforming growth factor-beta 1 (TGF-β1) in biological samples from rats, such as serum, plasma, cell culture supernatants, and tissue homogenates. This assay is widely applied in research settings to study immune regulation, inflammation, fibrosis, wound healing, and cancer progression. It helps researchers evaluate the role of TGF-β1 in disease models, assess the effectiveness of therapeutic interventions, and understand signaling pathways involved in tissue repair and immune suppression. The kit provides a sensitive and specific method for quantifying active and total TGF-β1, enabling accurate data collection in preclinical studies.