Used in research settings to quantify levels of plant β-carotene hydroxylase (CRTR-B), an enzyme involved in carotenoid biosynthesis. This ELISA kit enables scientists to study enzyme expression in various plant tissues, helping to understand metabolic pathways related to carotenoid production, such as the conversion of β-carotene to zeaxanthin. It supports studies in plant physiology, genetic engineering of crops for enhanced nutritional value, and development of biofortified food sources rich in vitamin A precursors. The assay is suitable for high-throughput analysis and provides a reliable tool for monitoring enzyme levels under different environmental or genetic conditions.