Question Completion Status 30 31 32 33 34 12 13 14 16 17 1 2 10 7 11 QUESTION 17 The titration curve shown here is most likely that of Oquiv O alanine O glycine O histidine O phenylalanine leucine
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- Question 1 Amyloid Precursor Protein (APP) is actually thought to be a natural neuroprotective agent induced by neuronal stress or injury. O True O False Question 2 Which of the following is not a property of serine protease? A globular protein with high molecular weight ● It is initially synthesized as a zymogen It has uniquely activated tyrosine residue at the active site Cleaves polypeptide at a specific amino acid residue Question 3 RTK is activated by cyclic AMP. O True FalseHydropathy & Amphipathicity 2 -1 -2- 110 210 310 410 510 Residue Number C. Draw the topology of this membrane protein in the bilayer and indicate the range of residues forming transmembrane a-helices.Treatment of a polypeptide by 2-mercaptoethanol yields two polypeptides that have the following amino acid sequences: Ala-Phe-Cys-Met-Tyr-Cys-Leu-Trp-Cys-Asn Val-Cys-Trp-Val-Ile-Phe-Gly-Cys-Lys Chymotrypsin-catalyzed hydrolysis of the intact polypeptide yields polypeptide fragments with the following amino acid compositions: (Ala, Phe) (Asn, Cys2, Met,Tyr) (Cys, Gly, Lys) (Cys2, Leu,Trp2,Val) (Ile, Phe,Val) Indicate the positions of the disulfide bonds in the original polypeptide.
- Treatment of a polypeptide by 2-mercaptoethanol yields two polypeptides that have the following amino acid sequences: Ala-Phe-Cys-Met-Tyr-Cys-Leu-Trp-Cys-Asn Val-Cys-Trp-Val-Ile-Phe-Gly-Cys-Lys Chymotrypsin-catalyzed hydrolysis of the intact polypeptide yields polypeptide fragments with the following amino acid compositions: (Ala, Phe) (Asn, Cys2, Met,Tyr) (Cys, Gly, Lys) (Cys2, Leu,Trp2,Val) (Ile, Phe,Val) Indicate the positions of the disulfide bonds in the original polypeptide. I don't understand how the order of amino acids in Step 2 was arranged. Please explain. Thank you.Briefly describe each of the following possible posttranslational protein modifications. Give an example of each. Cross-linkage glycosylation and phosphorylation cleavage assembly into polymeric proteins (> 1 polypeptide)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, using data inTable
- Please select appropriate word in each bracket Many anti-cancer drugs affect nucleotide metabolism and inhibit DNA synthesis. For example, a widely used anti-cancer agent, 5-fluorouracil, is a pyrimidine analog that is incorporated into nucleotide form and affects DNA synthesis by inhibiting the activity of [ Select ] ["thymidine kinase", "ribunucleotide reductase"] , the enzyme required to synthesize [ Select ] ["dTMP", "dUMP"] . This inhibition of DNA replication affects both cancer and normal cells, and hence there are serious side effects of these agents including [ Select ] ["immune system suppression", "hyperallergenic reaction"] and damage to the [ Select ] ["lining of the GI tract", "connective tissue of cartilage"] . Methotrexate, was the first drug to actually cure a cancer, choriocarcinoma, in 1958, and serves to block the activity of [ Select ] ["dihydrofolate reductase", "serine hydroxymethyl-transferase"] , another enzyme required for the synthesis of dTMP.Amino Acid 3-Letter 1-Letter Second letter Code Code Alanine Cysteine Aspartic acid or aspartate Glutamic acid or glutamate | Phenylalanine Glycine Histidine Ala Cys Asp Glu UCU Phe UGU cys UGC UUUT UAU Tyr UAC D UUC UC Ser UUA UAA Stop UGA Stop UAG Stop UGG Trp G UCA Phe Leu UUG UCG Gly G H. His Ile CUU CCU CAU CGU U His CAC CÚC Leu CUA CGC CGA Isoleucine Lysine Leucine Pro Arg Lys K CAA Gin CAG CCA Leu L. CUG CCG CG Methionine Met M AUU AUC le ACU) ACC AAU1 AAC AGU Asn Asparagine Proline Glutamine Arginine Serine Asn Ser AGC AGA Arg Pro P. Thr AAA Gln Arg Ser AUA ACA AUG Met ACG AAG Lys AGG R GUU) GCU) GAU1 GGU GGC Gly Threonine Valine Tryptophan Tyrosine Thr GUC Val GUA GCC Ala GCA Val V GAA GAG GGA W Trp Тут Glu GUG GCG GGG Y Apply all that you have learned to solve the following: If you have the following DNA sequence: 5-ATGGCIOTOGTATTAAATAG-3 1. What is the sequence of the bases in the complementary DNA strand in a 3' to 5 direction ?( NB" Just type the letter for the bases) 2.…Since two 19S regulatory subunits and a 20S catalytic unit constitute the 26S proteasome, why is the proteasome numbered as 26S and not 58S? What is the origin of/reason for this number?
- 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.…i need definition for Posttranslational modifications for collagenGiven: Cryo-EM structure of PCoV_GX spike glycoprotein 1. What can you tell me about the identity of the protein? 2. What is the importance of this protein?