In enzymology, an inositol 2-dehydrogenase (EC 1.1.1.18) is an enzyme that catalyzes the chemical reaction:myo-inositol + NAD+ 2,4,6/3,5-pentahydroxycyclohexanone + NADH + H+. Thus, the two substrates of this enzyme are myo-inositol and NAD+, whereas its 3 products are 2,4,6/3,5 pentahydroxycyclohexanone, 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. This enzyme participates in inositol metabolism and inositol phosphate metabolism.http://www.creative-enzymes.com/product/Native-Enterobacter-Aerogenes-MyoInositol-Dehydrogenase_1305.html