Main Menu 13 2 Fisher Projection of Monosaccharides

Main Menu 13. 2 Fisher Projection of Monosaccharides ØPlace the backbone of vertically. ØGroups on both sides point forward. ØGroups on head and tail point backward. Viewed as: 1

Fisher Projection and D/L Configuration Main Menu Note: draw the backbone of carbohydrates vertically. D-Glyceraldehyde (Aldotriose) Note: “D” is in smaller size. D: OH point to the right. L: OH point to the left. L-Glyceraldehyde 2

Examples Head Tail D-Aldohexose L-Aldohexose Note: place the CHO group on the top. 3

Summary of Aldoses Aldotetroses Aldopentoses D-Erythrose L-Erythrose D-Threoose L-Threose D-Ribose D-Arabinose D-Xylose D-Lyxose L-Ribose L-Arabinose L-Xylose L-Lyxose 4

Summary of Aldoses (continued) Aldohexoses D-Allose D-Altrose D-Glucose D-Mannose D-Gulose D-Idose D-Galactose D-Talose 5

Summary of Ketoses Ketotrioses Dihydroxyacetone Ketotetroses D-Erythrulose Ketopentoses D-Ribulose L-Ribulose D-Xylulose L-Xylulose 6

Summary of Ketoses (continued) Ketohexoses D-Psicose D-Fructose D-Sorbose D-Tagatose 7

Learning Check 1. Which of the following carbohydrates belong to D-monosaccharide? (a) I, III, V (b) I, IV (c) I, III, IV (d) II, IV, V (e) None of the above 8

Learning Check 2. Which of the following carbohydrates belong to L-monosaccharide? (a) I, III, V (b) II, IV (c) I, III, IV (d) II, IV, V (e) None of the above 9

Learning Check Main Menu 3. Which description based on the Fischer projection of the following compound is incorrect? (a) It is an aldose. (b) It is a D sugar. (c) It is a ketopentose. (d) It is a monosaccharide. (e) None of the above 4. Which description based on the Fischer projection of the following compound is correct? (a) It is an aldose. (b) It is a D sugar. (c) It is a ketopentose. (d) It is a L sugar. (e) None of the above 10