2-89The following is a block diagram for a sphingoglycolipidwhere the building blocks are labeled with letters and thelinkages between building blocks are labeled with numbers.A12BCa. Which building blocks are fatty acid residues?b. Which building blocks are carbohydrate residues?c. Which linkages are amide linkages?d. Which linkages could involve a monosaccharide?

Introduction Lipids are the organic compounds are nonpolar molecules which are soluble only in…

Answered: The following is a block diagram where…

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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Vitamin D3, the most abundant of the D vitamins, is synthesized from 7- dehydrocholesterol, a compound found in milk and fatty fish such as salmon and mackerel. When the skin is exposed to sunlight, a photochemical electrocyclic ring opening forms provitamin D3, which is then converted to vitamin D3 by a sigmatropic rearrangement. Draw the structure of provitamin D3.
Draw the following sugars using Haworth projections:a. b-d-galactopyranose b. a-d-tagatopyranose c. a-l-glucopyranose
2. 3 With the help of the internet and your textbook, A. hand-draw the chemical structures of dipalmitoyl phosphatidyl choline, DPPC (also known as lecithin, although lecithin is a more general name and can refer to other chemical structures). B. Where is DPPC found in a cell? 4 C. Is this a lipid, carbohydrate, protein or nucleic acid? Do not leave any "R" groups in the structure that you draw. With the help of the internet and your textbook, hand-draw the chemical structures of the following: A. ibuprofen (What trademarked product is this used in?) B. amoxicillin (What type of agent is this?) C. diltiazem (What condition is this used to treat?) D. L-aspartyl-L-phenylalanine methyl ester (What is this chemical's trade name?) E. atorvastatin (What trademarked product is this used in?) Draw each of these structures by hand. Do not leave any "R" groups in the structure that you draw. Using the structures you drew in questions 2 & 3, for each of the organic functional groups listed below,…
The 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'
Stearidonic acid (C18H28O2) is an unsaturated fatty acid obtained from oils isolated from hemp and blackcurrant (see also Problem 10.11). a. What fatty acid is formed when stearidonic acid is hydrogenated with excess Hạ and a Pd catalyst? b. What fatty acids are formed when stearidonic acid is hydrogenated with one equivalent of Hz and a Pd catalyst? c. Draw the structure of a possible product formed when stearidonic acid is hydrogenated with one equivalent of H2 and a Pd catalyst, and one double OH stearidonic acid bond is isomerized to a trans isomer. d. How do the melting points of the following fatty acids compare: stearidonic acid; one of the products formed in part (b); the product drawn in part (c)?
It is well known that sphingomyelin interacts with cholesterol and high affinity. What do you suppose is the structural basis for such interactions? Be specific.
It is important to note that galactose is an important component of glyco- proteins. What is the effect on glycoprotein synthesis in case of galactosemic patients who are not given galactose in their diet? Explain this observation.
The key reaction steps in the Edman degradation of polypeptides, which removes the N-terminal amino acid in the form of a "phenylthiohydantoin" (PTH-amino acid), are shown below. What is the expected outcome if the N-terminal amino acid is proline (Pro)? (The structure of proline is provided below for your reference.) NH-C00 NH CO0 phenyl isothiocyanate PITC NH CO0 NH CO0 peptide without the thiszolinone original Nterminal amino acid HE a PTH-amino acid Proline: HN HN. O Edman's reagent will not react with an N-terminal proline.
What is the difference between an enol phosphate and a normal phosphate ester that gives PEP such a high phosphoryl group transfer potential?
Cellulose and Chitin are very similar linear homopolysaccharides that have (β1-->4) linkages. However, there is one major chemical difference that affect its structural role. What is that difference and how does it affect its function?
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.
A schematic diagram of the helical structure of cytochrome b562 is reproduced below. Thisprotein belongs to the family of -proteins that have a four-helix bundle. Number the helices 1 – 4according to their N  C direction. Indicate relative orientations of the macrodipoles of helices 1 – 4adjacent to the diagram of cytochrome b562. Remember that according to the definition of a dipolethat the arrow points towards the positive end.

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