Write a mechanism for the interconversion of pyranose and furanose isomers in acidic media. HO HO OH H3O+ OH OH a+b glucopyranoses .OH HO OH номе OH a+b glucofuranoses
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- (b) Using alanine as an example, draw possible conformations of alanine in a peptide chain and identify which conformer is favoured. (c) Discuss how considering 'allylic strain' [see pages 33-39 of handout 1] can explain the favoured conformation in part b above, and how this is relevant to the B-sheet conformation in peptides/proteins.Please provide the solution to the following question using Robinson annulationTreatment of a new protein with dansyl chloride reveals two (2) dansyl-labelled derivatives of amino acids, alanine and methionine. What can you deduce about the structure of the proteinfrom these results?
- Which of the Allwing Paren thesis) has the highest molor heat Cupacity a) Glyeine (97A) 6) Alanıne (121 A) f Leucine (1AI A) Phunylalanıne (228 n") S Tryptophan (204 A) Omino aud residues (accessible surfaa area in In water?Trypsin is active in Acidic Alkaline Nutral All of above the term apoenzyme is applicable to simple enzyme protein part of conjugate enzyme organic cofactor of conjugate enzym inorganic cofactor of cinjugate enzymeGive typed solution only Which of the amino acids shown represents the structure of Ile at pH 10?
- Draw three-dimensional representations of the following amino acids. Explain their structures. (a) L-phenylalanine (b) L-histidine (c) D-serine (d) L-tryptophanShow how you could us the acetamidomalonate method to prepare the followig amino acids (a)Leucine (b)TryptophanName the following compounds as pyranose/furanose; Pyranoside/Furanoside; alfa/beta; Reducing/ non-reducing sugars
- Explain the following phenomenon:(1) KMnO4 usually not obtained in a pure & anhydride condition (2) Soap doesn’t form any foam in the Tap-waterGiven the following peptide SEPIMAPVEYPK(a) Estimate the net charge at pH 7 and at pH 12. Assume the pKa valuesgiven in as shown. (b) How many peptides would result if this peptide were treated with(1) cyanogen bromide, (2) trypsin, or (3) chymotrypsin?(c) Suggest a method for separating the peptides produced by chymotrypsintreatment.(a) Describe in detail how you will determine the primary structure of protein. (b)You have been given a mixture of lysine, histidine and cysteine. The isoelectric point of the amino acids are as follows:Histidine 7.64Lysine 9.74Cystenie 5.02Show how you will separate the mixture into the pure forms. State and describe any instrument that you will use to separate the components in the mixture.