1. Draw the ionization of eachamino acidsin varyingpHно1.889.602.34H,Nconditions3.65OHNH2OH2. Compute the pl of each aminoacids.Glycine(GLY)9.60Aspartic Açid(ASP)3. Whichamino acids migratetowards the cathode whenelectrophoresis is carried out atpH 7.1?10.532.18H,NOH4. Whichaminoacids migrateNH,towardstheanodewhen8.95electrophoresis is carried out atpH 7.1?Lysine(LYS)

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Answered: Draw the ionization of each amino acids…

Organic And Biological Chemistry

7th Edition

ISBN:9781305081079

Author:STOKER, H. Stephen (howard Stephen)

Publisher:STOKER, H. Stephen (howard Stephen)

Chapter9: Proteins

Section: Chapter Questions

Problem 9.57EP

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Using both three- and one-letter codes for amino acids, write the structures of all possible peptides containing the following amino acids: (a) Val, Ser, Leu (b) Ser, Leu2, Pro
A 1.00-mg sample of a pure protein yielded on hydrolysis 0.0165 mg of leucine and 0.0248 mg of isoleucine. What is the minimum possible molar mass of the protein? (MMleucine=MMisoleucine=131g/mol)
How many of the -amino acids shown in Table 26-1 contain aromatic rings? How many contain sulfur? How many contain alcohols? How many contain hydrocarbon side chains?
Lysine and tryptophan are two amino acids that contain an additional N atom in the R group bonded to the α carbon. While lysine is classied as a basic amino acid because it contains an additional basic N atom, tryptophan is classied as a neutral amino acid. Explain why this difference in classication occurs.
A compound is known to have a free amino group with a pKa of 8.6, and one other ionizible group with a pKa between 5 and 7. To 90mL of a 0.150M solution of this compound at pH 7.80 was added 35 mL of a solution of 0.18 M HCl. The pH changed to 6.40. What is the pKa of the second ionizable group?
Lysine and tryptophan are two amino acids that contain an additional Natom in the R group bonded to the a carbon. While lysine is classified asa basic amino acid because it contains an additional basic N atom,tryptophan is classified as a neutral amino acid. Explain why thisdifference in classification occurs.
A peptide has the sequence Glu–His–Trp–Ser–Gly–Leu–Arg–Pro–Gly The p?a values for the peptide’s side chains, terminal amino groups, and carboxyl groups are provided in the table. Amino acid Amino pKa Carboxyl pKa Side‑chain pKa glutamate 9.609.60 2.342.34 4.254.25 histidine 9.179.17 1.821.82 6.006.00 tryptophan 9.399.39 2.382.38 serine 9.159.15 2.212.21 glycine 9.609.60 2.342.34 leucine 9.609.60 2.362.36 arginine 9.049.04 2.172.17 12.4812.48 proline 10.9610.96 1.991.99 Calculate the net charge of the molecule at pH 11 and estimate the isoelectric point (pI)(pI) for this peptide.
Almost all proteins are composed from a set of about _____ amino acids.a. 4b. 10c. 20d. 50 ______ amino acids are considered essential.a. 5b. 10c. 15d. 20 An amino acid that has an indole group side chain.a. Trpb. Phec. Tyrd. ProWhich of the following is the simplest amino acid?a. Alab. Glyc. Vald. ProWhich of these will not give a blue solution with Ninhydrin testa. Prob. Phec. Alad. CysA neutral molecule with a positive and negative electrical charge.a. Isoelectric pointb. Zwitterionsc. Bufferd. Amphoteric3 amino acids joined together by two peptide bonds.a. Dipeptideb. Tripeptidec. Tetrapeptided. PolypeptideAn amino acid that can form disulfide bondsa. Cysteineb. Methioninec. Cystined. SerineWhich of the following is not a property of amino acidsa. Bufferb. Isoelectric pointc. Zwitterionsd. Insoluble in waterThe protein primary structure is held together bya. Hydrogen bondsb. Disulfide bondsc. Peptide bondsd. Protein bonds
A. Lysine is considered a basic amino acid containing a guanidino group. If all ionizable protons from lysine were deprotonated, what will be the overall charge for the lysine? B. Which of the following is true regarding amino acids? -Leucine and isoleucine have the same molecular mass. -Glycine is a chiral molecule. -Proline is considered to be an ⍺-amino acid. -Lysine (short for L) is a basic amino acid.
Based on the given figure,a. what is the possible identity of the amino acid?b. what is the isoelectric point of AAc. what is the pKa corresponding to the dissociation of alpha carboxylic groupd. where is the region or point where AA is predominantly present as a (-2) charged speciese. where is the effective buffering range for the amino acid on the acidic region
Lysine and tryptophan are two amino acids that contain an additional N atom in the R group bonded to the α carbon. While lysine is classified as a basic amino acid because it contains an additional basic N atom, tryptophan is classified as a neutral amino acid. Explain why this difference in classification occurs.
which amino acids has a side chains with a conjugate acid form that is neutral?

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Draw the ionization of each amino acids in varying pH conditions