Most common monosaccharide. Commercially from starch. Cereal roots, legumes, animal tissue, and liver. Mutarotation - The optical changes of glucose in water solution to constant value a20 D = +520 a - D - glucose -> D - glucose <- b - D - glucose a20 D = 113 a20 D = 52 a20 D = = 19 At equilibrium = 35% of a - form and 65% of b - form. Glucose (dextrose)
Most common monosaccharide. Commercially from starch. Cereal roots, legumes, animal tissue, and liver. Mutarotation - The optical changes of glucose in water solution to constant value a20 D = +520 a - D - glucose -> D - glucose <- b - D - glucose a20 D = 113 a20 D = 52 a20 D = = 19 At equilibrium = 35% of a - form and 65% of b - form. Glucose (dextrose)
2. Galactose - Component of lactose (milk sugar) a-D-Galactopyranose O OH OH CH2 OH HO OH
2. Galactose - Component of lactose (milk sugar) a-D-Galactopyranose O OH OH CH2 OH HO OH
3. Fructose (levulsoe) - Rotation in polarimeter is left D-Fructose b-D-Fructose a-D-Fructose CH2O H O CH2O H C HO C H H C O H H C O H O CH2O H C HO C H H C O H H C CH2O H CH2O H H C HO H C O H HO C H C O H CH2O H O or
3. Fructose (levulsoe) - Rotation in polarimeter is left D-Fructose b-D-Fructose a-D-Fructose CH2O H O CH2O H C HO C H H C O H H C O H O CH2O H C HO C H H C O H H C CH2O H CH2O H H C HO H C O H HO C H C O H CH2O H O or