1. (a) Draw a three-dimensional line structure of (4S,5Z)-4-amino-5,6-difluorohept-5-enal. Place the aldehyde group on the right-hand side of your drawing.(b) Give the Cahn-Ingold-Prelog priority order of the four groups (-C3H3F2. -NH2, -H, -C3H50) at the C4 stereocentre (Highest 1> 2> 3>4 Lowest).2. Study the curved arrows in the reactions below and provide structures of all the products that form for the given mechanistic step in the following reactions.(a)+0-H(b)H.

The Cahn Ingold Prelog is generally the sequence rules that are created for organic chemists Robert…

Answered: (a) Draw a three-dimensional line…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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(a) A decapeptide has the following amino acid composition: Alaz, Arg, Cys, Glu, Gly, Leu, Lys, Phe, Val Partial hydrolysis yields the following tripeptides: Cys-Glu-Leu + Gly-Arg-Cys + Leu-Ala-Ala+ Lys-Val-Phe + Val-Phe-Gly. Reaction of the decapeptide with 2,4-dinitrofluorobenzene yields 2,4-dinitrophenylysine om the experimental data, deduce the primary structure of the decapeptide.
Draw the structure of: The polysaccharide in (b) is dextran, a component of dental plaque. Here b: (b) a polysaccharide formed by joining D-glucose units in 1→6-α-glycosidic linkages
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
gal(a1→6)gal(a1→6)glc(a1→2B)fru. Which of the complete IUPAC of this tetrasaccharide? a-D-galactopyranosyl-(1→6)-ß-D-galactopyranosyl-(1→6)- a-D-glucopyranosyl-(1→2)-B-fructofuranose a-D-galactopyranosyl-(1→6)- a-D-galactopyranosyl-(1→6)- a-D-glucopyranosyl-(1→2)-ß-fructofuranoside a-D-galactopyranosyl-(1→6)- a-D-galactopyranosyl-(1→6)- a-D-glucopyranosyl-(1<→2)-ß-fructofuranose a-D-galactopyranosyl-(1→6)-B-D-galactopyranosyl-(1→6)- a-D-glucopyranosyl-(1→2)-ß-fructofuranoside
Carbohydrates Instructions: (A) Show the conversion from Fischer to Haworth projections. (B) Draw and give the systematic names of the two (2) possible Haworth structures for the following monosaccharides. 1.D- Ribose 2. D- Galactose 3. D- Fructose
Draw the structure of the disaccharide with a systematic name of: (1→6)-B-1) glucopyranosyl-B-D-fructofuranoside
Which 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-glucopyranose
An octapeptide was hydrolyzed and the amino acids separated. Its amino acid composition was determined: Gly (1); Ala (2); Val (1); Lys (2); Met (1); Asp (1). After incubation with FDNB and hydrolysis, 2,4-dinitrophenylalanine was detected. NO2 H H N C COOH ON- CH, Treatment with cyanogen bromide, which cleaves at M, resulted in two fragments: a pentapeptide containing two K residues and a tripeptide containing V, G, and A. The residues are not listed in any particular order. After treatment with trypsin, which cleaves at R and K, there were three fragments: two dipeptides and MGAV. What is the sequence of the octapeptide? Use the one-letter abbreviations for the amino acids, and do not use dashes.
One or more of the compounds shown below will satisfy each of the following statements. Not all compounds may be used; some may be used twice. Put the number(s) in the blank. (1) Found in chitin. (2) An L-saccharide. (3) The first residue attached to asparagine in N-linked glycans. (4) A uronic acid. (5) A ketose. CH,OH CoO COO OH H H H H ОН Н но OH OH H OH H HO OH H NHC- CH, Oso, OH (a) (b) (c) CH,OH CH,OH CH,OH C=0 CHOH C=0 H-C- OH CH,OH но -с-н ČH,OH CH,OH (d) (e)
Indicate the following for each disaccharide: I) type of glycosidic linkage i.e. a(1→4) II) configuration i.e. alpha or beta 1. ОН CH₂OH OH I) II) III) IV) 0 ОН 0 CH₂OH OH ОН OH 2. HO CH₂OH I) II) III) IV) ОН HOCH₂, OH ·0 НО 0 ОНА CH₂OH 3. HO I) II) III) IV) CH OH OH O ОН III) reducing or non-reducing sugar IV) name of each monosaccharide HO CH₂ ОН OH ОН 4. HO I) II) III) IV) CH₂OH 0 OH ОН CH₂OH OH О ОН ОН
Which 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
Draw the two possible Haworth structures (both alpha and beta anomers) for the following monosaccharides and give their corresponding systematic names. [Show the stepwise process] D-Ribose D-Galactose D- Fructose

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