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Chapter 21: Q64P (page 1027)

Draw the product obtained when a lysine side chain in a polypeptide reacts with maleic anhydride.

Short Answer

Expert verified

There are 20 naturally occurring amino acids. Some different classifications of amino acids include acidic and basic amino acids. Lysine and arginine are basic amino acids that comprise two basic nitrogen-containing groups.

Step by step solution

01

Amino acids

There are 20 naturally occurring amino acids. Some different classifications of amino acids include acidic and basic amino acids. Lysine and arginine are basic amino acids that comprise two basic nitrogen-containing groups.

02

The product obtained when a lysine side chain in a polypeptide reacts with maleic anhydride

Lysine is a basic amino acid comprising a nitrogen group. Hence, it can react with an electrophilic position by providing the lone pair on the basic nitrogen.

The mechanism of lysine with maleic anhydride is given below.

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Most popular questions from this chapter

Show the peptides that would result from cleavage by the indicated reagent:

a. Val-Arg-Gly-Met-Arg-Ala-Ser by carboxypeptidase A

b. Ser-Phe-Lys-Met-Pro-Ser-Ala-Asp by cyanogen bromide

c. Arg-Ser-Pro-Lys-Lys-Ser-Glu-Gly by trypsin

Draw the predominant form for glutamate in a solution with the following pH:

a.0 b. 3 c. 6 d. 11

What aldehyde is formed when valine is treated with ninhydrin?

Draw the predominant form for glutamate in a solution with the following pH:

a. 0 b. 3 c. 6 d. 11

Why are the carboxylic acid groups of the amino acids more acidic

(pKa ~ 2) than a carboxylic acid such as acetic acid (pKa = 4.76)?
See all solutions

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