Tartronic semialdehyde

This enzyme [EC 4.1.1.54] catalyzes the conversion of dihydroxyfumarate to tartronate semialdehyde and carbon dioxide. 

This enzyme [EC 1.1.1.60], also referred to as tartronate semialdehyde reductase, catalyzes the reversible reaction of (i )-glycerate with NAD(P)" to produce 2-hy-droxy-3-oxopropanoate and NAD(P)H. 

Some bacteria use a "dicarboxylic acid cycle" to oxidize glyoxylate OHC-COO to C02. The regenerating substrate for this cycle is acetyl-CoA. It is synthesized from glyoxylate by a complex pathway that begins with conversion of two molecules of glyoxylate to tartronic semialdehyde ... 

Conversion of the reducing end-unit in 2-0-(4-0-methyl-D-glucosyl-uronic acid)-D-xylose to a tartronic semialdehyde residue (as in LXXVII) facilitated the ready isolation of 4-O-methyl-D-glucuronic acid by acid hy-... 

Glycorata pathway an anaplerotic pathway which enables the utilization of glyoxylate in plants and microorganisms TWo molecules of glyoxylate are converted to tartronate semialdehyde by tartronate... 

Tartronata-samialdahyda synthase, gfyoxylate carboligase (EC 4.1.1.47) a plant enzyme which converts two molecules of glyoxylate to tartronate semialdehyde and CO2. Hydroxymethyl thiamin pyrophosphate is a reactive intermediate in the reaction. Hie enzyme plays a role in the biosynthesis of carbohydrates from C2 compounds. 

The second possible method whereby ascorbic acid might be synthesized through condensation of two three-carbon compounds is by means of a benzoin-type acyloin reaction between tartronic semialdehyde and L-glyceraldehyde. In this case 3-keto-L-gulonic acid is the product of... 

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