Biochemistry
9th Edition
ISBN: 9781319114671
Author: Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher: W. H. Freeman
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- asap plsarrow_forwardDraw the tetrapeptide Met-Ile-Lys-Glu at a ph of 7?arrow_forwardConsider the peptide Trp-Arg-Glu-Cys-Gly-Tyr. For the drawings requested below, please show them in zig-zag style, from amino to carboxy terminus, with correct stereochemistry Draw the predominant form at pH = 2 Draw the predominant form at pH = 5 Draw the predominant form at pH = 7 Draw the predominant form at pH = 12arrow_forward
- a. Suppose that you have the peptide Ala-Gly-Tyr-His-Leu and you treat it with FDNB and then 6M HCl. Draw the structures of all the products that you will have in solution (assume all reactions to go to completion).arrow_forwardThe last residue of the protein (tail) is Tryptophan, and the first residue (head) is labeled with IAEDANS acceptor. Estimate the length of the protein (head to tail) if the efficiency of RET measures at 0.01 Please show step by step and how to get the 34.014 numberarrow_forwardThe biosynthetic pathway for the two amino acides E and H is shown schematically in the Figure below: A W E 2 Z H How would this pathway change if C was mutated and non-functional?arrow_forward
- Determine the sequence of the following 10-mer of ferritin using the data below. i. Complete acid hydrolysis of the 10-mer results in identification of 1A, 1D, 1E, 1F, 1H, 1K, 2L, 1T, 1Y ii. Digestion of the 10-mer with chymotrypsin results in 3 fragments containing (D, H, K, T), (F, L) and (A, E, L, Y) iii. Digestion of the 10-mer with V8 protease, which cuts on the C-side of acidic amino acids, results in three fragments containing (D, F, L, Y), (A, E, L) and (H, K, T) iv. Digestion with trypsin results in a fragment H-T and a fragment with all the other amino acids v. Treatment of the 10-mer with FDNB followed by complete acid hydrolysis results in the following two derivatives, DNP-1 and DNP-2 vi. Treatment of the 10-mer with a carboxypeptidase results in a free threoninearrow_forwardBased on the pK, table for amino acids (Table 1.1), draw the structures with net charge, and the equilibria representing the complete deprotonation of aspartate. Table 1.1 Name pK pk2 pKR Glycine Alanine 2.4 9.8 2.3 9.7 Valine 2.3 2.4 9.6 Leucine 9.6 Isoleucine 2.4 9.7 Methionine 2.3 9.2 Phenylalanine Proline Serine 1.8 9.1 2.0 10.6 2.1 9.2 Threonine 2.6 10.4 Cysteine Asparagine Glutamine 1.8 10.8 8.3 2.0 8.8 2.2 9.1 Tyrosine Tryptophan Aspartate Glutamate 2.2 9.1 10.9 2.4 9.4 2.0 2.2 10.0 3.9 9.7 4.3 Histidine 1.8 9.2 6.0 10.8 Lysine Arginine 2.2 9.2 1.8 9.0 12.5arrow_forward6 (a) A decapeptide has the following amino acid composition: Ala2 , Arg, Cys, Glu, Gly, Leu, Lys, Phe, Val Partial hydrolysis yields the following tripeptides: Cys-Glu-Leu + Gly-Arg-Cys + Leu-Ala-Ala+ Lys-Val-Phe + Val-Phe-Gly. Reaction of the decapeptide with 2,4-dinitrofluorobenzene yields 2,4-dinitrophenylysine. From the experimental data, deduce the primary structure of the decapeptide. (b) Suggest a scheme you will follow to synthesize the dipeptide Ala-Glyarrow_forward
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