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Chapter 4: Q4-18P (page 95)

Draw the structure of Lys and Ala linked by an Isopeptide bond.

Short Answer

Expert verified

The Isopeptide bond formation between Lysine and Alanine was understood.

Step by step solution

01

What is an Isopeptide bond?

An isopeptide bond is a peptide formed between the side chains carboxyl group of one amino acid to the amino group of the second amino acid. These are intermolecular covalent bonds formed at positions other than an alpha group of amino acids. These kinds of bonds may appear spontaneously during the process of protein folding.

02

Structure of dipeptide made of Lysine and Alanine by Isopeptide bond

Hence, the Isopeptide bond formation was understood using the Lysine and Alanine amino acids.

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Most popular questions from this chapter

The protein insulin consists of two polypeptides termed the A and B chains. Insulins from different organisms have been isolated and sequenced. Human and duck insulins have the same amino acid sequence with the exception of six amino acid residues, as shown below. Is the pI of human insulin lower than or higher than that of duck insulin?

List some covalent modifications of amino acids in proteins.

A sample of the amino acid tyrosine is barely soluble in water. Would a polypeptide containing only Tyr residues, poly(Tyr), be more or less soluble, assuming the total number of Tyr groups remains constant?

(a) What is the net charge at neutral pH of a tripeptide containing only alanine? (b) How does the total number of negative and positive charges change following hydrolysis of the tripeptide?

Some hormone-signaling pathways result in the phosphorylation of tyrosine resides in proteins. Draw the structure of a phosphotyrosine side chain.
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