VII. Draw the structure of melezitose (either in Haworth or in conformer): a-D-glucopvranosyl- (1-3)-B-D-fructofuranosyl-(2-1)-a-D-glucopyranoside Is it a reducing sugar?*
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Draw what is ask and identify whether it is a reducing sugar.
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- gal(α1→6)gal(α1→6)glc(α1↔2β)fru. Which of the complete IUPAC of this tetrasaccharide? α-D-galactopyranosyl-(1→6)-β-D-galactopyranosyl-(1→6)- α-D-glucopyranosyl-(1↔2)-β-fructofuranoside α-D-galactopyranosyl-(1→6)- α-D-galactopyranosyl-(1→6)- α-D-glucopyranosyl-(1↔2)-β-fructofuranoside α-D-galactopyranosyl-(1→6)- α-D-galactopyranosyl-(1→6)- α-D-glucopyranosyl-(1↔2)-β-fructofuranose α-D-galactopyranosyl-(1→6)-β-D-galactopyranosyl-(1→6)- α-D-glucopyranosyl-(1↔2)-β-fructofuranoseWhich of the following is the correct systematic name of the disaccharide shown? α-D-glucopyranosyl-(1→3)-β-D-galactopyranose α-D-gulopyranosyl-(1→4)-β-D-glucopyranose α-D-gulopyranosyl-(1→4)-β-D-galactopyranose α-D-glucopyranosyl-(1→3)-β-D-glucopyranoseWhich structure is the correct Haworth representation of a-D-glucopyranosyl-(1-3)-B-D-galactopyranose? он OH но- OH OH OH OH он он он но- но HO OH OH он он OH OH Он OH он OH OÀ D
- Identify the structure of O-a-D-sorbopyranosyl-(24)-B-D-glucopyranose below. The following structures will help: НО Н ОН х Н H H D-sorbose Н OH CH₂OH Н Н Н OH HO Н H HO H н HO ОН Н н Н О ОН O H Н CH₂OH OH OH н 0 CH2OH Н OH Н H OH Н CH₂OH H ОН Н OH Н Н Н РО OH Н HO OH н н -O CH2O Н O H H OH н Н OH CH₂OH о CHOH H H Н Ко OH H OH Н Н OH Н OH Н OH Н CH₂OH -OCHOH H OH O CH OH Н OH Н Н CH₂OH ОН он OH OH H OH H O OH CH₂OH OH ОН Н O OH OH D-glucose Н ОН Н ОН ОНs N-acetyl-β-D-glucosamine a reducing sugar? What about D-gluconate? Is the disaccharide GlcN(α1→1α)Glc a reducing sugar?Which of the following is the correct systematic name of the disaccharide shown? OH он но но но- OH Он a-D-glucopyranosyl-(1-3)-B-D-galactopyranose O a-D-glucopyranosyl-(1–3)-B-D-glucopyranose O a-D-gulopyranosyl-(1-4)-B-D-glucopyranose O a-D-gulopyranosyl-(1-4)-B-D-galactopyranose
- Which of the following best describes the molecule below? . CHOH H H CH OH H OH OH CH OH OH H. OH B -D-galactopyranosyl-(104)-D-glucopyranose a -D-glucopyranosyl-(102)-D-fructofuranoside a -D-glucopyranosyl-(102)-D-glucofuranoside B -D-galactopyranosyl-(104)-D-fructopyranoseWhat sugar units make up the structure shown? ÇH,OSO;- но Po- H H. ÇOO- NHCCH, H OH H H OH O D-Glucuronate and N-Acetyl-D-galactosamine-6-sulfate O D-Glucuronate and N-Sulfo-D-glucosamine-6-sulfate O D-Iduronate and N-Acetyl-D-galactosamine-6-sulfate O D-Glucuronate and N-Acetyl-D-glucosamine-6-sulfateWhat sugar units make up the structure shown? D-Iduronate and N-Acetyl-D-galactosamine-6-sulfate D-Glucuronate and N-Acetyl-D-glucosamine-6-sulfate D-Glucuronate and N-Sulfo-D-glucosamine-6-sulfate D-Glucuronate and N-Acetyl-D-galactosamine-6-sulfate
- When a certain trisaccharide is completely methylated (i.e. all of the free OH groups have been converted to OCH3 groups) and then hydrolyzed (i.e. all of the glycosidic linkages have been broken) equal molar amounts of 2,3,4,6-tetra-O-methyl-D-galactose, 2,3,4-tri-O-methyl-D- mannose, and 1,2,4,6-tetra-O-methyl-D-glucose are obtained. When this same trisaccaride is treated with beta-galactosidase ( an enzyme that hydrolyzes the indicated glycosidic bond indicted by it's name) it yields D- galactose and a disaccharide. Treatment of the resulting disaccharride with alpha- mannosidase yields D-mannose and D-glucose. Draw the structure of the beta anomer of the original trisaccharide.Match the following structural composition with the corresponding polysaccharide Linear homoglycan of glucose connected by α1-4 linkages Branched glycan formed by alternating units of D-galactose and L-galactose Linear sulfated chains of alternating β-D-galactopyranose and 3,6-anhydro- α-galactopyranosyl units Poly-β-Dmannopyranosyluronic acid and/or Poly-α-L-gulopyranosyluronic acid Repeating Poly-D-galacturonic acid residues…Match the following structural composition of each polysaccharide with its identity Linear homoglycan of glucose connected by α1-4 linkages Linear sulfated chains of alternating β-D-galactopyranose and 3,6-anhydro- α-galactopyranosyl units Poly-β-Dmannopyranosyluronic acid and/or Poly-α-L-gulopyranosyluronic acid Repeating Poly-D-galacturonic acid residues deacetylated straight-chain amino-polysaccharide polymer linked in a β(1-4) type of linkage a. Alginate b. amylose c. chitosan d. carrageenan e. Pectin