from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Any of various simple sugars, such as glucose and fructose, that have six carbon atoms per molecule.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A sugar or saccharide containing six carbon atoms.
from the GNU version of the Collaborative International Dictionary of English
- n. Any member of a group of sugars containing six carbon atoms in the molecule. Some are widely distributed in nature, esp. in ripe fruits.
from The Century Dictionary and Cyclopedia
- n. A simple sugar (monosaccharide) containing six atoms of carbon.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a monosaccharide that contains six carbon atoms per molecule
Harden and Young also demonstrated that the process stops before all sugar (glucose) has been used up, but it starts again on addition of inorganic phosphate, and they suggested that hexose phosphates are formed in the early steps of fermentation. von Euler had done important work on the structure of co-zymase, shown to be nicotinamide adenine dinucleotide (NAD, earlier called DPN).
Warburg had shown that this yellow pigment is involved in catalysis of the oxidation of hexose-monophosphoric acid during yeast metabolism.
In 1936, extending their quantitative analytical methods to hexose monophosphates in glycogenolysis, they discovered a new intermediate, glucose-1-phosphate, the Cori ester.
Therefore a ring opening step will be the first step catalyzed by isomerases for any pentose or hexose substrate.
As explained earlier, dilute acid hydrolysis is very effective in breaking the glycosidic linkages between component hexoses, but it also breaks down the sugar hexose units.
Ethanol (ethyl alcohol, grain alcohol) is produced by yeast fermentation of hexose sugars (such as those derived from cereal grains, sugarcane, or sugar beet) and subsequent separation from the aqueous solution by distillation.
Potentially, any source of hexose sugars can be used.
Nirenberg's thesis, performed under the guidance of Dr. James Hogg, was a study of a permease for hexose transport in ascites tumor cells.
Of Meyerhof's many achievements, perhaps the most important is his proof that, in isolated but otherwise intact frog muscle, the lactic acid formed is reconverted to carbohydrate in the presence of oxygen, and his preparation of a KC1 extract of muscle which could carry out all the steps of glycolysis with added glycogen and hexose-diphosphate in the presence of hexokinase derived from yeast.
These were the hexose constituents of the hydrolysed complex, the pentoses (or 'furfuroids') surviving intact.
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