Xanthoxin dehydrogenase

In enzymology, a xanthoxin dehydrogenase (EC number|1.1.1.288) is an enzyme that catalyzes the chemical reaction

:xanthoxin + NAD⁺ $ightleftharpoons$ abscisic aldehyde + NADH + H⁺

Thus, the two substrates of this enzyme are xanthoxin and NAD⁺, whereas its 3 products are abscisic aldehyde, NADH, and H⁺.

This enzyme belongs to the family of oxidoreductases, specifically those acting on the CH-OH group of donor with NAD+ or NADP+ as acceptor. The systematic name of this enzyme class is xanthoxin:NAD+ oxidoreductase. Other names in common use include xanthoxin oxidase, and ABA2. This enzyme participates in carotenoid biosynthesis.

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