Biochemistry: Concepts and Connections (2nd Edition)
2nd Edition
ISBN: 9780134641621
Author: Dean R. Appling, Spencer J. Anthony-Cahill, Christopher K. Mathews
Publisher: PEARSON
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Textbook Question
Chapter 9, Problem 11P
Draw (using Haworth projections) the fragments of xylan and glucomannan structures shown on page 295.
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Draw (using Haworth projections) the fragments of xylan and glucomannanstructures as shown.
Draw (using Haworth projections) the fragments of xylan and glu-
comannan structure
There is another melanocyte-stimulating hormone called β-melanotropin.Cleavage of β-melanotropin with trypsin produces the following peptidesplus free aspartic acid. WGSPPK DSGPYK MEHFRIf you assume maximum sequence similarity between α-melanotropin andβ-melanotropin, then what must the sequence of the latter be?
Chapter 9 Solutions
Biochemistry: Concepts and Connections (2nd Edition)
Ch. 9 - Prob. 1PCh. 9 - -D-Galactopyranose rotates the plane of polarized...Ch. 9 - Provide an explanation for the fact that a-...Ch. 9 - Why is a type O individual considered a universal...Ch. 9 - The disaccharide , -trehalose differs from the ,...Ch. 9 - A reducing sugar will undergo the Fehling...Ch. 9 - Prob. 7PCh. 9 - Prob. 8PCh. 9 - Indicate whether the structures shown are R and S...Ch. 9 - Prob. 10P
Ch. 9 - Draw (using Haworth projections) the fragments of...Ch. 9 - One or more of the compounds shown below will...Ch. 9 - Why do you suppose that the influenza virus...Ch. 9 - Prob. 14PCh. 9 - Are mannose and galactose epimers? Allose and...Ch. 9 - Prob. 16PCh. 9 - Explain in about one sentence why it is important...Ch. 9 - Prob. 18PCh. 9 - Prob. 19PCh. 9 - Prob. 20PCh. 9 - Prob. 21PCh. 9 - Prob. 22PCh. 9 - Prob. 23P
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- The endorphins are a group of naturally occurring neurotransmitters that act in a manner like morphine to control pain. Research has shown that the biologically active parts of the endorphin molecules are simple pentapeptides called enkephalins. Draw the structure of the methionine enkephalin with the sequence Tyr-Gly-Gly-Phe-Met. Identify the N-terminal and C-terminal amino acids. Bradykinin is a nonapeptide that stimulates smooth muscle contraction, dilates blood vessels, causes pain, and is a component of bee venom. Give the IUPAC name of the nonapeptide. Note: The selected photo is the sequence of Bradykinin.arrow_forwardDetermine the codon sequence for the peptide sequence glycylserylcysteinylarginylalanine. How many possibilities are there?arrow_forwardWhat are the sequences of all the possibletripeptides that contain the amino acids aspartic acid, leucine, andphenylalanine? Use the three-letter abbreviations to express youranswer.arrow_forward
- Porcine dynorphin is a neuropeptide having 17 amino acid residues. Its structure is shown below. Tyr-Gly-Gly-Phe-Leu-Arg-Arg-Ile-Arg-Pro-Lys-Leu-Lys-Trp-Asp-Asn-Gln 8. How does trypsin catalyze the hydrolysis of peptides? You can answer this question by identifying the amino acids involved and whether the hydrolysis is at their amino side or the carboxyl side or if particular amino acids end up at the N-teminal end or at the C-terminal end. 9. List down the different fragments that would result if dynorphin were cleaved by trypsin. 10. How does chymotrypsin catalyze the hydrolysis of peptides? You can answer this question by identifying the amino acids involved and whether the hydrolysis is at their amino side or the carboxyl side or if particular amino acids end up at the N-teminal end or at the C- terminal end. 11. List down the different fragments that would result if dynorphin were cleaved by chymotrypsin. 12. Cyanogen bromide is a chemical reagent which also cleaves peptide bonds.…arrow_forwardThe melanocyte-stimulating peptide hormone a-melanotropin has the following sequence:Ser–Tyr–Ser–Met–Glu–His–Phe–Arg–Trp–Gly–Lys–Pro–Val(a) Write the sequence using the one-letter abbreviations.(b) Calculate the molecular weight of a-melanotropin, using data inTablearrow_forwardDraw a peptide for cys-asn- pro-gly (Using the same format in picture)arrow_forward
- The melanocyte-stimulating peptide hormone α-melanotropin has the following sequence: Ser–Tyr–Ser–Met–Glu–His–Phe–Arg–Trp–Gly–Lys–Pro–Val(a) Write the sequence using the one-letter abbreviations.(b) Calculate the molecular weight of α-melanotropin, using data in as shown.arrow_forwardThe melanocyte-stimulating peptide hormone a-melanotropin has the following sequence: Ser-Tyr-Ser-Met-Glu-His-Phe-Arg-Trp-Gly-Lys-Pro-Val (a) Write the sequence using the one-letter abbreviations. (b) Calculate the molecular weight of a-melanotropin, a da'arrow_forwardExplain the Titration Curve of Lysine in figure 1.arrow_forward
- Draw the α-l-glucopyranose sugars using Haworth projections:arrow_forwardWhy is the position of Cys 58 important in 3GRS(GLUTATHIONE REDUCTASE)? When Cys 58 is mutated to GLY 58 how would it impact the 3D structure and function of 3GRS? explain in terms of how Cys and GLY have different properties and how it would impact the function of 3GRS (the binding sites etc.) You can see your structure(3GRS ) here or any other website: https://www.rcsb.orgarrow_forwardConsider the peptide Asp-Lys-Phe-Glu-Asn-Tyr-Gln-Val-Cys. In a single beaker, you treat this peptide with 2 proteases. One protease cleaves at the N-terminus of aromatic R groups and the other cleaves at the C-terminus of polar, non-ionizable R groups. Following the enzymatic digestion, you want to separate your peptide fragments so that you can identify them. You choose to separate the fragments using an anion exchange column. Beginning at pH=6 you apply your peptide fragments to the column and you gradually decrease the pH of the column stopping the separation when the pH of the column equals 4. Omitting chemical structures, write the amino acid sequence of the peptide fragments that are produced from this digest. Write the order that these fragments will elute from the column (if at all). (Relevant pKa values are: 2.1, 3.8, 4.3, 8.3, 9.6, 10.1, and 10.5)arrow_forward
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