L– is when it rotates the plane-polarized light in a counterclockwise direction. This nomenclature designates D– when the glucose stereoisomer rotates the plane-polarized light in the clockwise direction. Two forms exist: Dextroglucose ( D-Glucose) and Levoglucose ( L-Glucose) based on Fischer projection. In humans, the conversion of fructose or galactose into glucose occurs primarily in the liver. In fructose metabolism, fructose enters glycolysis by similarly going through certain steps prior to entering glycolysis. In galactose metabolism, galactose enters glycolysis by first being phosphorylated via the enzyme galactokinase and then converted into glucose-6-phosphate. In terms of energy metabolism, glucose is the most commonly used since the organism readily utilizes glucose over galactose or fructose in glycolysis. However, of the three, fructose has the lowest melting point (i.e. Also, glucose has a lower melting point (146 ☌ vs. the carbon at which anomers rotate), the hydroxyl groups of glucose are in the equatorial position. Except for the hydroxyl group on the anomeric carbon (i.e. Nonetheless, glucose can be structurally identified from galactose based on the orientation of the hydroxyl group (OH) at carbon 4. Thus, glucose and galactose are more structurally alike. Both glucose and galactose are aldoses whereas fructose is ketose. Hence, they are hexose monosaccharides, owing to the six carbon atoms. The three have the same chemical formula: C 6H 12O 6. Nevertheless, glucose is the most abundant. Glucose, galactose, and fructose are the three most common monosaccharides. ![]() It is a crystalline solid, water-soluble, and sweet tasting. ![]() The molar mass of glucose is 180.156 g/mol. Its general chemical formula is C 6H 12O 6.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |