The amino acid alanine has two isomers, a-alanine and ẞ-alanine. When equal masses of these two compounds are dissolved in equal amounts of a solvent, the solution of a-alanine freezes at the lowest temperature. Which form has the larger equilibrium constant for ionization (HX=H+X-)? (A) B-alanine B a-alanine

Q: Write the structural formula (flat projection) of the dipeptide glycyl-phenylalanine (Glycine is the…

A: When the OH group of one amino acid and H of amine group of another amino acid condensed to give a…

Q: 2. Classify the following amino acids as nonpolar, polar basic, polar acidic, or polar neutral. (a)…

A: Polar neutral amino acids: These amino acids have polar side chains, but they are not charged.…

Q: An unknown acetylenic amino acid obtained from the seed of a tropical fruit has the molecular…

A: The catalytic hydrogenation over platinum is a process of the addition of hydrogen molecules across…

Q: All amino acids have two ionizable functional groups: an α‑amino group (average p?a of 9.4) and an…

A: The ionization of Aspartic acid according to the question is shown in the figure:

Q: H2N-CHC-OH CH2 H2N-CHC-OH CHOH CH3 H2N-CHC-OH CH2 HN- H2N-CHC-OH CH2 OH

A: Amino acids:- These are basically the building blocks of protein. They contain an acid(COOH)…

Q: As the pH changes in an aqueous solution, Glutamic acid can exist in the neutral (zwitterionic) form…

A:

Q: Write the structure for the protein Pro-Asn-Tyr-Cys at pH 7.0.

A: Amino acid: An amino acid is an organic molecule and it consists of amine group (NH2), acidic…

Q: Of the four sequences below, one can be that of a peptide, others can't. Which is the one that can…

A:

Q: The amino acid glycine is often used as the main ingredient of a buffer in biochemical experiments.…

A: In a 0.1 M solution of glycine at pH 9.0, the amino group of glycine can exist in two forms: as NH₂…

Q: The first step in the procedure asks you to prepare five dilutions of the protein standard (BSA) in…

A: During the dilution process, solvent is added to the solution and hence changing the concentration…

Q: Ascorbic acid, H₂C6H6O6, is a diprotic acid usually known as vitamin C. For this acid, pKa1 is 4.10…

A: Answer:Ascorbic acid is the weak acid and it dissociates partially in its solution, therefore an…

Q: a) Canavanine is an amino acid that is produced by some legume plants. It is not used in proteins…

A: Canavanine has a similar structure of Arginine.  Hence Canavanine has 3 groups that can be…

Q: 4) In the lab you are extracting and enzyme called catalase from a potato and want to use this…

A: Enzymes are commonly help in speed up the reaction. Catalase is an enzyme that is found in almost…

Q: When the pentapeptide below is heated first with 2,4-dinitrofluorobenzene (and base) and then…

A:

Q: The amino acid histidine has ionizable groups with pKa values of 1.8, 6.0, and 9.2, COOH H₂N-CH CH…

A: GIVEN The pKa1, pKa2 and pKa3 values of Histidine are given as 1.8, 6.0 and 9.2. Initial pH of…

Q: Draw the predominant form of this amino acid at pH = 12.

A: Calculate the isoelectric point (pl) for the given amino acid  At pI the amino acid exist as…

Q: Identify the following amino acid in aqueous form (at pH = 7.0): (COO)–CH(NH3)–CH(OH)–CH3 A.…

A: Acidic and basic  amino acid did not  have equal number of acid and amine groups . For neutral amino…

Q: Consider an amino acid with the following pKa values: pKa1 = 2.71 and pK, = 9.31 At what pH value in…

A: Amino acids are amphoteric in nature due to the presence their ionizable α-amino and α-carboxylic…

Q: Identify the following amino acid at pH = 7 (aqueous form): (COO-)–CH(NH3+)–CH2–(COO-) aspartic…

A: These questions are about amino acids which are the building blocks of proteins. Various amino acids…

Q: Identify the following amino acids: -H,C-C-NH, and OH-CH2- Enter the names of the amino acids in the…

A:

Q: Question 6 of 25 > Modify lysine to show the predominant form at pH 7. Modify the amino acid by…

A: Amino acids are bullding blocks of proteins. pH measures how acidic or basic a solution is.

Q: The reactant in an enzyme-catalyzed reaction is called a cofactor. True or False True False

A: Catalysts take part in chemical reactions and speed them up. They are neither consumed nor included…

Q: 13.2) Draw the line bond structure for the general form of an amino acid using "R" to represent the…

A: Here we have to draw line structure of predominant form of amino acid at physiolgical pH = 7.4

Q: According to the Henderson–Hasselbalch equation, when the pH of a solution of histidine is 1.85,…

A: When the pH of a solution of histidine is 1.85, what is the ratio of the carboxylic acid form of the…

Q: Which amino acid has an aromatic R group? phenylalanine glutamate lysine glutamine

A:

Q: Which amino acid is hexagonal close packed? is it glycine?

A: Solutions- hexagonal close packed structure

Q: Calculate the molecular weight of a small protein if 5.90 g sample of this protein is dissolved in…

A: P = CRTWhere, P = osmotic pressure in atm; R = 0.0821 L atm mol-1 K-1, T = temperature in K

Q: what are two amino acids that could form a salt bridge with each other?

A: Salt bridge is interactions of amino acids which have charges opposite to each other where heavy…

Q: H₂N O ZI ZI N HS. OH O OH + H₂O

A: The three amino acids will be Glycine, Cysteine and Glutamic acid.

Q: See Appendix on p5 for list of amino acids. Aspartame is a sweetener. The structure of aspartame,…

A: The question is based on the concept of amino acids. we need to identify the Amino acids and draw in…