Used to measure anthocyanidin reductase (ANR) enzyme activity in plant tissues, this ELISA kit helps researchers study flavonoid and proanthocyanidin (condensed tannin) biosynthesis pathways. It is widely applied in plant biochemistry and molecular biology to assess ANR expression under different physiological conditions, genetic modifications, or environmental stresses. The kit enables high-throughput analysis, making it valuable for plant breeding, quality control in crops with health-promoting polyphenols, and functional genomics research.