Biochemistry: The Molecular Basis of Life
Biochemistry: The Molecular Basis of Life
6th Edition
ISBN: 9780190209896
Author: Trudy McKee, James R. McKee
Publisher: Oxford University Press
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Chapter 5, Problem 13RQ
Summary Introduction

To review:

The following amino acids either as polar ornonpolar, and eitheracidic or basic:

a. Glycine

b. Tyrosine

c. Glutamic acid

d. Histidine

e. Proline

f. Lysine

g. Cysteine

f. Aspargine

i. Valine

j. Leucine

Introduction:

An amino acid isa biologicalmicromoleculethat has two functional groups on the samecarbon atom. These functional groups are carboxylic acid (-COOH) and an amino group ( -NH2 ). The carbon atom is also bonded with a singlehydrogenatom and aside chain (R). An amino group and a carboxylgroup can neutralize each other and affect the overall polarity of the amino acid. On the basis of polarity, amino acids can be classified into two types:polar amino acidandnonpolar amino acid (uncharged).

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Question 25 Calculate the net charges of the following peptides at pH 7.4. Indicate which amino acids bear chuarged side chans a) NH2-Asp-Leu-Phe-Ala-Lys-Pro-Glu-Gly-COOH b) NH2-GIn-Glu-Lys-Tyr-Trp-Arg-Ala-Leu-COOH DELL
A posttranslational modification that directs a polypeptide toa specific site is called a _____________________modification.
When a purine or pyrimidine is linked through a b-Nglycosidic link to C-1 of a pentose, the molecule is calleda _________________________.

Chapter 5 Solutions

Biochemistry: The Molecular Basis of Life

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