Draw the structure of the disaccharide α -glycosyl(1-6)-galactose in the β anomeric form and circle the part of this structure that makes the compound a reducing sugar.
Draw the structure of the disaccharide α -glycosyl(1-6)-galactose in the β anomeric form and circle the...
Explain how many REDUCING GROUPS are in the molecule disaccharide and Draw the structure showing Reducing Sugars Draw the structural formula for a-D-glucosyl-(1->6) -D-mannosamine and circle the part of this structure that makes the compound a reducing sugar.
II. Disaccharide/polysaccharide structure Disaccharide: Maltose 1. Give the full name of the disaccharide assigned to you, containing the two monosaccharides and their isomeric forms. 2. Draw the disaccharide in ring form, and in the correct anomeric conformations. 3. Is your disaccharide a reducing or a non-reducing sugar? Explain your answer. 4. At least one of the monosaccharides that compose the disaccharide assigned to you is a pyranose. Select one of them, and draw its stereoisomer L-pyranose (with the same anomeric...
2. Draw the structural formula for a- D-glucosyl-(1->6)-D-mannosamine, and circle the part of this structure that makes the compound a reducing sugar. (4 pts.)
2. Answer the following quetions about sialic acid: a. Is it an α or β anomeric form? b. Will sialic acid mutorotate between α and β anomeric forms c. Is this a deoxy sugar? d. How many chiral carbons are in the sugar ring?
A disaccharide G is formed from β-D-lyxopyranose and α -D-idopyranose joined by β-1,6'-glycosidic linkage. Draw the structure of β-D-lyxopyranose and α-D-idopyranose Draw the structure and give the IUPAC name of disaccharide G Does disaccharide G mutarotate. Explain your answer.
1)Simplify how many reducing groups are in the molecule dissacharide?DRAW STRUCTURES 2) There are 2 lactose formations of anomeric. Although no anomeric forms of sucrose have been reported. Explain why and draw the 2 forms Reducing Sugars Draw the structural formula for a-D-glucosyl-(16)-D-mannosamine and circle the part of this structure that makes the compound a reducing sugar.
1. Draw glucose B-D-glucose in a chair form, and circle the anomeric carbon. Why is the anomeric carbon significant? 2. Why is cyclization of sugars important? What does the concept of mutarotation indicate to us about dual roles of monosaccharides? Two part question: 3. Why are monosaccharides most commonly found in pyran and furan ring forms, rather than: A) other ring motifs -(think along the lines of: why NOT 3,4, or 7 membered rings)? B) in their linear form? 4....
Question 7: The structure of the disaccharide rutinose that is formed in this reaction is shown below. The assay used to monitor the reaction measures the concentration of rutinose formed based on its reaction as a reducing sugar. Based on the structure of rutinose shown below, explain what part of the molecule makes it a reducing sugar. You can answer in words or draw an arrow to the part of the molecule that makes it a reducing sugar. OH HO...
2. Lactose is a disaccharide sugar composed of galactose and glucose that is found in milk. But how can we determine the order that the glucose and galactose are connected in this disaccharide? Use your knowledge of reactions from CHE 128 (e.g. alcohols, aldehydes and hemi-acetals) to propose an experiment (i.e. a series of reactions or experiments) that will answer this question. (this part counts as the BONUS question for quiz #5) OH HO OH OH HO OH HO HO...
Post-lab questions (1) In a Michael reaction, an α carbon attacks the β carbon of an α,β-unsaturated carbonyl com pound to afford a 1,5-dicarbonyl compound. Ethyl acetoacetate has two a carbons: why does the a carbon sandwiched between the two carbonyls conduct the attack? Ph Ph 0 Ph Michael OCH2CH3 5 OCH2CH3 OCH2CH 0 This forms... ...not this: Why? (2) In a Robinson annulation, an α,β-unsaturated carbonyl compound reacts with a carbonyl compound to afford a (new) cyclic α,β-unsaturated ketone...