Sucrose T able sugar Hydrolyzed into glucose and fructose Dietary sucrose Honey Many fruits Importance of fructose Energy production 15 of daily energy arising from fructose Major source of energy for spermatozoa in seminal vesicle ID: 1048682
Download Presentation The PPT/PDF document "Fructose metabolism Source of fructose" is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.
1. Fructose metabolismSource of fructoseSucrose (Table sugar): Hydrolyzed into glucose and fructose.Dietary sucrose: Honey – Many fruits.Importance of fructoseEnergy production: 15% of daily energy arising from fructose.Major source of energy for spermatozoa in seminal vesicle.Metabolism of fructoseA- In the liverLiver contains fructokinase enzyme which phosphorylates fructose into fructose-1-phosphate.
2.
3. B- In extrahepatic tissuesWhile fructokinase enzyme is not available in muscles and adipose tissue, fructose is metabolized by hexokinase and other enzymes into pyruvate for oxidation.
4. C- In the seminal vesicle (Conversion of glucose into fructose)Fructose is the main nutrient for sperm.Deficiency of fructose in semen causes male infertility.
5. Galactose metabolismSource of galactoseMainly dietary milk consumption.Importance of galactoseSynthesis of lactose (milk sugar).Synthesis of glycolipids (cerebrosides) and other heteropolysaccharides.Metabolism of GalactoseA- Conversion of galactose into glucoseSite: Liver
6.
7. B- Conversion of glucose into galactose and lactose synthesisSite: Mammary glands