Choose Two. The Ramachandran plot indicates: B Ca E ||||||| C1 H H A Combined preference for a about both & 11/ conformation cl-ca and ca-n bonde Existence of a peptide in an x-helical conformation Or P sheeted 2 . The prefered conformation about CON bond. The prefered conformation about C1-C bond The prefesed conformation about peptide bond.
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- Thesecondarystructureofaproteinisinfluencedbybothhydrogen bonding and London dispersion forces. a. Usingastructuralformula,showanexampleofhydrogenbonding between the serine portion of a protein and the tyrosine portion b. Usingastructuralformula,showanexampleofLondondispersionforces between the leucine portion of a protein and the valine portionSars-CoV-2 spike protein: VGIYLQKTSDHRPEFALAMN What is its isoelectric point of this peptide?I. A protein, X, was Isolated from a pathogenlc mlcroorganism. The proteln Is a vlrulence factor whose path0genlclty lies In a heptapeptide of unknown sequence. After trypsin cleavage of the heptapeptide from protein X, the peptlde's compOsition and sequence was determined. The fOllowing were the results of the sequenclng process: 1. When the peptide was treated with dinitrofluorobenzene (DNFB), DNP-asp and a mixture of amino acids were produced. 2. When the same Intact peptide was treated with streptococcal protease, a pentapeptide of composition asp, asN, cys, gly and ser and 2 amlno acids were released. 3. When the heptapeptlde was also treated with hydrOxylamine HCI, a tripeptide and a tetrapeptide were obtained. The C-terminal amino acid of the tripeptide was asN. 1) What is the sequence of the heptapeptide if it is composed of cys, asp, lys, asN, gly and ser only? 2) What is the pl of the heptapeptide?
- Subjecting this peptide to one cycle of the Edman degradation would result in L-M-F-V-W-E-Q-A-P-S-P Leucine OA. O B. Proline oc Leucine phenylthiohydantoin OD. Proline phenylthiohydantoin None of the above OE.sars-coV-2 spike protien what is the isoelectric point of this peptide? VGIYLQKTSDHRPEFALAMNGiven the peptide Lys-Glu-Trp a) Draw the appropriate titration curve for this peptide. Label X and Y axis b) On the graph use X to mark point at which peptide have 0 net charge and Y to mark point where peptide have positive 1 net charge
- At a pH of 10, would you expect this peptide to be retained for a longer time within an anion exchange column or a cation exchange column? His-Met-Asp-Tyr-Phe-Serwnich snows tne specinicity pockets. The S pocket nas a Ra glutamic acid in the bottom, the S2 pocket is small and hydrophobic, and the S,' pocket is deep and hydrophobic. Suggest a 3-amino acid sequence that this protease would R2 H cleave and indicate between which sites the peptide bond would be broken. S2 Which sequence would this protease cleave? Val-Lys-Phe Phe-Lys-Val Lys-Phe-Val Val-Phe-Lys Phe-Val-Lys O Lys-Val-Phe The peptide bond that is broken is between which sites? O S2 and S,' OS, and S,' O S2 and S1 O S2 and S1, and S and S,' IZClassify the symmetrical arrangement ofthe subunits (e.g., C2 , C3 , D 2 , helical, icosahedral). 1. Proteobacterial nitrite sensor (3PNS):2. Pseudomonad oligosaccharide receptor (7POR):3. Adenoviral structural protein (8ASP)
- 1. The human hemoglobin molecule, like all mammalian he- moglobins, is comprised of two a-chains and two ß-chains con- ₂ taining 141 and 146 amino acid residues, respectively. Be- cause the molecule possesses two-fold symmetry, there are a1-a2, B1-B2, and a1-B2 interfaces formed by amino acid sidechains through which structural changes are transmitted underlying ligand binding. The most important of these is the a1-B2 interface that is illustrated in the diagram on the right. All of the sidechain interactions across the a1-B2 interface are hydrophobic except for that between Asp(a94) and Asn- (B102). This is the only polar interaction across the α1-³2 in- terface and it helps to stabilize the oxy- or R-conformation. Its approximate location in the Hb molecule is represented by the red double arrow in the diagram on the right. His FG4 97 Asp G1 (99) Tyr C7 (42) Hb mutant (a) T State (deoxy) 95 The C6 41 (a) The diagram below on the right-hand side illustrates the polar Asp(a94). . . Asn…Please help! Sketch a titration curve of the peptide Ala-Tyr-Gln-Met-Asp-His from pH=0 to 14 up to 5 equivalnets of KOH (Please type answer)Indicate whether each listed solid-phase peptide synthesis step is performed one time or performed repetitively. React amino-protected amino acid with solid support [Select] React amino-protected amino acid with DCC (dicyclohexyl carbodiimide) [Select] React amino-protected and carboxyl-activated amino acid with growing peptide chain [Select] Deprotect amino acid sidechains [Select]