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Some substrates and reactions of GatDH. A, GatDH performs the NAD+-dependent regioselective dehydrogenation of the sugar alcohol galactitol at C5 producing l-tagatose and NADH. Similarly, xylitol is oxidized at C4 to l-xylulose (reaction not shown) (5). B, hydrogenation of short, aliphatic 1-hydroxy-ketones preferably yields the S-enantiomer of the 1,2-diol (5, 7). C, structures of substances co-crystallized with GatDH or used for soaking experiments of GatDH crystals.
