Log out Go to App
Go to App

Learning Materials

Features

Discover

Chapter 29: Q2. (page 1156)

What form exists at the isoelectric point of each of the following amino acids: (a) valine; (b)leucine; (c)proline; (d) glutamic acid.

Short Answer

Expert verified


(a)


(d)

Step by step solution

01

Isoelectric point

The isoelectric point denoted as pI constitutes the pH at which a specific molecule comprises a total electrical charge of zero. The pI of the molecule comprising one amine and a carboxyl group can be evaluated according to the formula:


02

Amino acid

Organic compounds possessing a carboxylic group and an amino group together with an alkyl group are amino acids. The different categories of amino acids comprise essential and non-essential amino acids.

03

Identification of the form that exists at the isoelectric point of each amino acid

(a)The form existing at the isoelectric point for the amino acid, valine is given as:

Form existing at the isoelectric point for valine

(b)The form existing at the isoelectric point for the amino acid, leucine is given as:

Form existing at the isoelectric point for leucine

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Draw the products of each reaction.

(a)

(b)

(c)

(d)

Draw the structure of leu-enkephalin, a pentapeptide that acts as an analgesic and opiate, and has the following sequence: Tyr–Gly–Gly–Phe–Leu. (The structure of a related peptide, met-enkephalin,

appeared in Section 22.6B.)

Devise a synthesis of each amino acid from acetaldehyde:

(a) Glycine;

(b) Alanine.

Draw the organic products formed in each reaction.

a. Draw the structure of the tripeptide A-A-A, and label the two ionizable functional groups.

b. What is the predominant form of A-A-A at pH=1?

c. ThepKa values for the two ionizable functional groups (3.39 and 8.03) differ considerably from thepKa values of alanine (2.35 and 9.87;see table 29.1). Account for the observedpKa differences.
See all solutions

Recommended explanations on Chemistry Textbooks

The Earths Atmosphere

Read Explanation

Physical Chemistry

Read Explanation

Chemical Reactions

Read Explanation

Kinetics

Read Explanation

Making Measurements

Read Explanation

Chemistry Branches

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.

Sign-up for free