Which of the following best describes the peptide backbone in a β-sheet? Group of answer choices highly extended coiled compacted rigid none of these choices
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- Which of the following amino acids is most unlikely to be present in a beta sheet? Lysine Valine Leucine Isoleucine 14Which of the following peptides will likely form a loop or turn in a protein and explain whyA tetradecapeptide (14 amino acid residues) gives the following peptide fragments on partial hydrolysis. From this information, deduce the primary structure of this polypep- tide. Fragments are grouped according to size. Pentapeptide Fragments Tetrapeptide Fragments Phe-Val-Asn-Gln-His Gln-His-Leu-Cys His-Leu-Cys-Gly-Ser His-Leu-Val-Glu Gly-Ser-His-Leu-Val Leu-Val-Glu-Ala
- Given below are sequences of amino acids present in an oligo-peptide chain. Count the overall chargeof each assigned peptide and write it in your answer. Along with it also mention that toward swhichelectrode (cathode or anode) will the peptide move? Please remember that cathode is a negativeelectrode and anode is a positive electrode. Ile-Lys-Arg-Trp-Lys-Asn-Glu-His-Pro-Asp-Ala-Tyr-Phe-Glu-Met-Phe-Gly-ValCan you please describe the specific components that each of these structures are comprised of ( alpha helices and beta sheets) in more detail? Also, what do the different colors represent? Your reply will be greatly appreciated. The ligand that was assigned to me is tadalafil.A newly discovered blob protein folds very rapidly in the presence of protein disulphide isomerase and peptidyl prolyl cis-trans isomerase enzymes but aggregates and never folds correctly without protein disulphide isomerase. Explain why this might occur.
- Given below are sequences of amino acids present in an oligo-peptide chain. Count the overall charge of each assigned peptide and write it in your answer. Along with it also mention that toward which electrode (cathode or anode) will the peptide move? Please remember that cathode is a negativeelectrode and anode is a positive electrode. Ile-Lys-Arg-Trp-Lys-Asn-Glu-His-Pro-Asp-Ala-Tyr-Phe-Glu-Met-Phe-Gly-ValReaction of the α-carboxyl group of an amino acid or peptide with phenylisothiocyanate allows for the determination of the amino acid residue in the N-terminus of an unknown peptide True FalseA 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.
- Small molecules are used as inhibitors of protein action - as drugs. They most often do this by blocking the active site within the protein. Potential drugs can be screened computationally to determine if they are strongly bound to the protein. Figure 1 shows a possible conformation of a candidate drug molecule, 4-bromo-2- carboxymethylamide-pyrrole (abbreviation: BCMAP) at the active site of a protein (abbreviation: PR). Figure 2 shows the full protein structure whilst figure 3 shows a known inhibitor of the protein at the site, overlayed with another calculated conformer of BCMAP. (c) Outline how you would investigate whether BCMAP would be an effective inhibitor for the protein in competition with the molecules that the protein normally targets, and any solvent. Figure 1. 4-bromo-2-carboxymethylamide-pyrrole (BCMAP) (C, N, O, and Br atoms in yellow, blue, red, and brown, respectively) in the active site of the protein structure.Write the chemical structure of peptide containing the following amino acid PRO-SER-GLY-LEU I NEED IT ASAP PLEASEa protein pretreated with an sds page detergent shows two bands around 100 and 150 kD on the electrophoresis gel.Same protein is treated with the SDS and 2-mercaptoethanol reveal a single band 50 kd on gel.How many subunits would this protein contain