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22. Calculate the net charge on the...
Consider the following peptide: Lys-Tyr-Glu-His- Glu-Ala- Arg-His-Lys What is the net charge of this peptide at...
Consider the following peptide: Lys-Tyr-Glu-His- Glu-Ala- Arg-His-Lys What is the net charge of this peptide at pH = 1 (you must show work for full credit!)? What is the net charge of this peptide at pH = 14 (you must show work for full credit!)?
Please explain. 8. What will be the overall charge of the following peptide in the following...
Please explain.
8. What will be the overall charge of the following peptide in the following pH values? (10 points) Arg Glu Glu Lys Asn Trp Met Tyr Arg Leu Lys OH Overall 7 14 4
What is the approximate net charge of the following pentapeptide at pH 10? Arg-Gln-Cys-His-Ala What is...
What is the approximate net charge of the following pentapeptide at pH 10? Arg-Gln-Cys-His-Ala What is the Isoelectric point (pI) of the peptide given above? Use the pKa values given here when needed: Side group/ amino acid pKa Asp 3.9 Glu 4.1 HIs 6.0 Cys 8.4 Tyr 10.5 Lys 10.5 Arg 12.5 C-term 3.5 N-term 9.0
-2. Which of the following tripeptides would carry a net charge of-1 at pH 7? Markallthatapply....
-2. Which of the following tripeptides would carry a net charge of-1 at pH 7? Markallthatapply. (3 pts.) A. Asp-Ala-Arg C. Lys-Gly-Asn D. Glu-Lys-Asp E. Leu-Asp-Glu F. Arg-lleu-Cys B. Met-Pro-Glu The Kd for a dimeric protein complex is 2.2 μM. (3 pts.) Mark all that are true about this dimeric protein complex. A. 3. At equilibrium, the concentration of the individual subunits is very, very low. B. If this is a homodimer, it can be called an αβ dimer. C....
3. A protein contains the following amino acids: O ALA 4 GLN 1 LEU 3 ARG...
3. A protein contains the following amino acids: O ALA 4 GLN 1 LEU 3 ARG 4 GLU 4 LYS 4 ASN 5 GLY O MET 1 ASP 1 HIS 2 PHE 4 ILE 4 PRO 8 SER 5 THR 1 TRP 2 TYR 2 VAL BGYS. a) What is its net charge at pH 1? b) What is its net charge at PH 13? c) Calculate the pl. 4. In what order would the amino acids GLU, LYS, and...
Calculate the net charge on the following peptide that contains an intramolecular disufide bond at pH...
Calculate the net charge on the following peptide that contains an intramolecular disufide bond at pH 12. Assume that the peptide and disulfide bonds are stable at this pH. This question does not require you to draw the structure of this peptide, only to calculate the appropriate charge. You must identify where each charge comes from; you can't just give a final net charge number. Show all your work to obtain any-credit. (8 pts) QUESOn Calculate the net charge on...
Predict the charge on the major species of the peptide Ile-Lys-Asp-Arg-Ser-Gln at pH 7.0 Please explain...
Predict the charge on the major species of the peptide Ile-Lys-Asp-Arg-Ser-Gln at pH 7.0 Please explain if you can. Thanks
On your internship, you visit the Mass Spectrometry Lab. Mass spectrometry can identify short peptide fragments...
On your internship, you visit the Mass Spectrometry Lab. Mass spectrometry can identify short peptide fragments based on their molecular weights. Your fellow intern Jerry has neglected to label his tubes of amyloid beta peptide 42 after digesting them with some proteases that we learned about in Module 6: pepsin, trypsin, and chymotrypsin. Help him figure out what protease is in each tube. Jerry’s supervisor has the fragments listed in the same order as the original peptide primary sequence, which...
Can someone explain how these work? 4. For a solution of Cys (C), at what pH...
Can someone explain how these work?
4. For a solution of Cys (C), at what pH would the net charge be closest to 1? a) 10.7 b) 8.4 c) (1.9-8.4)/2 = 5.5 d) (10.7 + 8.4)/2 = 9.55 5. For a solution of Tyr (Y), what percentage of the side chain R group's OH would be deprotonated at pH = 10.5? a) 0% b) 25% c) 50% d) 100% 6. For the peptide His -Asp-Gln-Glu-Ala- Lys (HDQEAK), what would be...
Calculate the net charge of a peptide sequence W-S-N-G-C-H (all connected : Tryptophan-Serine-Asparagine-Glycine-Cysteine-Histidine) pKa values at...
Calculate the net charge of a peptide sequence W-S-N-G-C-H (all connected : Tryptophan-Serine-Asparagine-Glycine-Cysteine-Histidine) pKa values at (a) pH 2.0, (b) 6.0 (c) 7.0 and (d) 11.5. Assuming the ionisable groups have pKa values of His 6.0, Asp 3.6, Tyr 10.0, Cys 8.3, Arg 12.5, Lys, 10.5, Glu 4.3 C-term -COOH 2.0, N-term -NH3 + 9.5.
Please explain.
8. What will be the overall charge of the following peptide in the following pH values? (10 points) Arg Glu Glu Lys Asn Trp Met Tyr Arg Leu Lys OH Overall 7 14 4
-2. Which of the following tripeptides would carry a net charge of-1 at pH 7? Markallthatapply. (3 pts.) A. Asp-Ala-Arg C. Lys-Gly-Asn D. Glu-Lys-Asp E. Leu-Asp-Glu F. Arg-lleu-Cys B. Met-Pro-Glu The Kd for a dimeric protein complex is 2.2 μM. (3 pts.) Mark all that are true about this dimeric protein complex. A. 3. At equilibrium, the concentration of the individual subunits is very, very low. B. If this is a homodimer, it can be called an αβ dimer. C....
3. A protein contains the following amino acids: O ALA 4 GLN 1 LEU 3 ARG 4 GLU 4 LYS 4 ASN 5 GLY O MET 1 ASP 1 HIS 2 PHE 4 ILE 4 PRO 8 SER 5 THR 1 TRP 2 TYR 2 VAL BGYS. a) What is its net charge at pH 1? b) What is its net charge at PH 13? c) Calculate the pl. 4. In what order would the amino acids GLU, LYS, and...
Calculate the net charge on the following peptide that contains an intramolecular disufide bond at pH 12. Assume that the peptide and disulfide bonds are stable at this pH. This question does not require you to draw the structure of this peptide, only to calculate the appropriate charge. You must identify where each charge comes from; you can't just give a final net charge number. Show all your work to obtain any-credit. (8 pts) QUESOn Calculate the net charge on...
Can someone explain how these work?
4. For a solution of Cys (C), at what pH would the net charge be closest to 1? a) 10.7 b) 8.4 c) (1.9-8.4)/2 = 5.5 d) (10.7 + 8.4)/2 = 9.55 5. For a solution of Tyr (Y), what percentage of the side chain R group's OH would be deprotonated at pH = 10.5? a) 0% b) 25% c) 50% d) 100% 6. For the peptide His -Asp-Gln-Glu-Ala- Lys (HDQEAK), what would be...
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