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- 1.Ala-Phe-Lys-Val-Val-Glu From the above polypeptide, what amino acid/s go/goes inside the cell after the following treatment: Chemotrypsin, thermolysin, then finally pepsin. What protein is left undigested? Write the primary structure of the undigested protein? 2.K-V-F-W-P-L-A-Y a.Chemotrypsin treatment b.Trypsin treatment c.Pepsin treatment d.Thermolysin treatment 3.Total acid hydrolysis of a pentapeptide complemented by total alkalinehydrolysis yields an equimolar mixture of 5 amino acids listed alphabetically, ala-cys,lys,phe,ser. N-terminal analysis with phenylisothiocyanate (PITC) generate PTH-ser. Trypsin digestion produces a tripeptide where N-terminal residue is cys and a dipeptide with ser as its N- terminal.Chemotrypsin digestion of the above tripeptide yields ala plus another dipeptide. A.What is the amino acid sequence of the tripeptide B.What is the amino acid sequence of the dipeptide derived from trypsin digestion? C.What is the primary structure of the original…1. The amino acid sequence for the protein lysozyme is given below. Estimate the isoelectric point for lysozyme protein. The pK, values are provided in Table 3.1. KVFGRCELAAAMKRHGLDNYRGYSLGNWVCAAKFESNFNTQATNRNT DGSTDYGILQINSRWWCNDGRTPGSRNLCNIPCSALLSSDITASVNCAKK IVSDGNGMNAWVAWRNRCKGTDVQAWIRGCRL Here's the sequence in this form: LYS VAL PHE GLY ARG CYS GLU LEU ALA ALA ALA MET LYS ARG HIS GLY Table 3.1 Typical pk, values of ionizable groups in proteins Group Acid Typical pK, Base Terminal a-carboxyl 3.1 group Aspartic acid Glutamic acid 4.1 N. Histidine 6.0 -N + H Terminal a-amino group 8.0 Cysteine 8.3 Тутosine 10.9 + H Lysine 10.8 H H. + N-H Arginine 12.5 N-H N-H Note: Values of pk, depend on temperature, ionic strength, and the microenvironment of the ionizable group. inGiven the Ramachandran Plot below, identify the protein components that could adopt the phi-psi angle combination indicated by the number 3. (IF YOU COPY UR ANSWER FROM ANOTHER WEBSITE I WILL DISLIKE)
- S1.What functional group (pictured below) is used in the formation of ATP, the backbone of DNA, and the plasma membrane? R. - HO- asluolom OgH 910m ansa obyd to inuoms adisi69 101 P- Hnedenoi HO 9tom anisinos H 19w 1639 eniv blut viend ou nontel:oceansied bol-ngtsl s19 1591 a. Amino b. Carbonyl c. Ester d. Phosphate e. Alcohol Sabios onime Tertio of bensemoo Insietib ti aolem tsrll blas onims ns to neg at to quang ly snodibod for ogh quotgg) (CH3)₂ - CH₂ -CH-COOH + CH₂-CH-COOH -H₂O NH₂ OH NH₂ 4. Write the equation for the digestion (hydrolysis) of Phe-Asp-Ala. €a. An oligopeptide ALVGALGATPTPQMWSHSWRGVSIKS was digested with trypsin.Which method would be most appropriate for separating the products: ion exchange or gel filtration chromatography? Explain.b. Suppose that the peptide was digested with cyanogen bromide. What would be the optimal separation technique? Explain
- . The following diagram shows the biosynthesis of B12 coenzymes, starting with the vitamin. DMB is dimethylbenzimidazole. (a) What one additional substrate or cofactor is required by enzyme B? (b) Genetic deficiency in animals of enzyme C would result in exces- sive urinary excretion of what compound?9. H. State if/how Aureliano's mutation changes the amino acid sequence and describe the effect that change has, if any, on the protein.10. o . Briefly discuss Ramchandran plot. . What is quaternary structure of proteins? Mention the role of various bond in its structure with the help of an example give its biochemical function. What are liposomes? Discuss their role in medicine. . Differentiate between cerebroside and ganglioside and one disorder associated with each. R
- Given the Ramachandran Plot below, identify the protein components that could adopt the phi-psi angle combination indicated by the number 3.Denatured protein is in a low energy state. What sort of explanation can you use to rationalize that statement? Hint: consider Gibbs free energy.9. A daily diet of a 55-ycar-old woman, consisted of a 500 g of carbohydrates, 100 g of animal fats and 150 g of proteins, at the background of low physical activity. What possible consequences for the lipid metabolism such lifestyle could trigger? For the answer: a) compare the daily food consumption of the patient with the norm for this age and level of physical activity; b) draw the scheme of TAG synthesis in the liver and continue with their following transport to the tissues; c) draw the scheme of metabolic pathways which are more active in adipocytes of this patient compared with an individual of the same age consuming balanced dict; d) name the biologically active molecules released by adipocytes of this patient.