Draw the structure of the pentapeptide, ERNFW, at pH 1.5, 7.0 and 12.5.
At low pH (1.5), all acidic and basic groups exist in protonated form. At pH (7.0), acidic group exist in deprotonated form and basic group exist in protonated form. At high pH (12.5), all groups exist in deprotonated form.
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Draw the structure of the pentapeptide, ERNFW, at pH 1.5, 7.0 and 12.5.
Draw the Lewis structure of the pentapeptide Met-Glu-Leu-His-Lys as it will exist at the following pH's РH 2.5 a. b. рH 7.0 pH 10.0 с. d. What is the isoelectric point for this peptide?
Draw the Lewis structure of the pentapeptide Met-Glu-Leu-His-Lys as it will exist at the following pH's РH 2.5 a. b. рH 7.0 pH 10.0 с. d. What is the isoelectric point for this peptide?
draw the structure of the Almanine ph 7.0: ph 2.0 and ph 13.0 include the name three letter designation and one letter designation
Draw the structure of the dipeptide Lys-Glu at pH 7.0. Label the
following:
a) Peptide bond
b) N-terminus
c) C-terminus
d) An α-amino group and an ε-amino group
e) An α-carboxylate group and a Y-carboxylate group
Draw the structure of the dipeptide Lys-Glu at pH 7.0. Label the following: (a). peptide bond, (b). N-terminus, (c). C-terminus, (d). an a-amino group and an e-amino group, (e), an α-carboxylate group and a -carboxylate group.
[B] Draw structure of the pentapeptide Met-Phe-Leu-Pro -Trp (10 Points)
c) You place your pentapeptide into a buffer with a pH=4. What direction will your pentapeptide move: Circle the correct answer. (2 marks) It will not move. Towards the positive electrode Towards the negative electrode Briefly Explain why: (2 marks) d) You are trying to separate 2 other peptides from your pentapeptide. Peptide 1 is made up of the amino acids: ARKS Peptide 2 is made up of the amino acids: ADES At what pH would you be able to...
What is the ratio of the –COOH group to the –COO-1 group for proline at pH 7.0? Calculate the pI of A) Tyrosine and B) Arginine. What is the overall charge of the pentapeptide SHDNF at pH 7.0? What is the overall charge of the pentapeptide SHDNF at pH 3.0 (assume no hydrolysis of the backbone occurs)? What is the overall charge of the pentapeptide SHDNF at pH 10.0 (assume no hydrolysis of the backbone occurs)?
5. Draw the structure of a polypeptide with the sequence N–Thr-Val-Pro-C at pH 7.0. This tripeptide is found in the chemotherapeutic agent dactinomycin.
5. 1.5 mLs of 6 M HCl are added to 250 mL of water (pH=7.0). What is the resulting (H') and the final pH?
#1) For the following pentapeptide (Where pH =1):
a) What would the net charge be for the following pH?
pH 0 =
pH 3 =
pH 5 =
pH 7 =
pH 10 =
pH 13 =
b) Calculate the pl of the pentapeptide. (Cysteine: pK1 = 1.96,
pK2 = 10.128) ( Glutamine: pK1 = 2.17 , pK2 = 9.13) (Arginine: pK1
= 2.17. pK2 = 9.04) (Leucine: pK1 = 2.36 , pK2 = 9.60)
c) If you were to...
1) Draw the amino acid lysine at PH 1.0, PH 7.0, and PHI 1200 (label each)