What is "ketohexose"

n. (context organic chemistry English) Any hexose containing an ketone group

n. a monosaccharide having six carbon atoms and a ketone group

A ketohexose is a ketone-containing hexose (a six-carbon monosaccharide). The most common ketohexoses, each of which represents a pair of enantiomers (D- and L-isomers), include psicose, fructose, sorbose, and tagatose. Ketohexose is stable over a wide pH range, and with a primary pK of 10.28, will only deprotonate at high pH, so is marginally less stable than aldohexose in solution.

| D- Psicose CASCC.png | D- Fructose | D- Sorbose | D- Tagatose

| L- Psicose | L- Fructose | L- Sorbose | L- Tagatose