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Chapter 16: Q. 16.61 (page 580)

a. Draw the condensed structural formula for Ser-Lys-Asp.

b. Would you expect to find this segment at the center or at the surface of a protein? Why?

Short Answer

Expert verified

(Part a)

a)

(Part b)

b)

Polar R-group amino acids make up this peptide.

As a result, they can be found on the surface of the protein structure.

Step by step solution

01

step-1  Given information (part-a)

  • Amino acids have two functional groups: An amine -NH2and a carboxylic acid (-COOH). The a-carbon is covalently linked to both functional groups.
  • All proteins are constructed from aminoacids.
  • A dipeptide is generated when two aminoacids are joined by an amide bond formed between the amine group of one amino acid and the carboxylic group of the second aminoacid.
  • Proteins are macromolecules made up of aminoacids, which are repeating subunits that dictate the form and function of the protein.
02

step-2  Explanation (part-a)

03

step-3  Given information (part-b)

  • The aliphatic side chains of hydrophobic aminoacids make them water insoluble.
  • These hydrophobic amino acids are present inside the protein structure,
  • whereas hydrophilic amino acids have polar side chains and can be found on the surface or outside.
04

step-4 Explanation (part-b)

  • This peptide comprises polar R-group amino acids.
  • As a result, they are present on the protein structure's surface.

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Most popular questions from this chapter

What is the reactant for each of the following enzymes?

a. peptidase

b. cellulase

c. lactase

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Ethylene glycol HO−CH2−CH2−OHis a major component of antifreeze. If ingested, it is first converted to HOOC-CHO oxoethanoic acid and then to HOOC-COOH oxalic acid, which is toxic added to a radiator to prevent freezing and boiling.

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Consider the amino acids lysine, valine, and aspartate in an enzyme. State which of these amino acids have Rgroups that would:

a. be found in hydrophobic regions.

b. be found in hydrophilic regions.

c. form hydrogen bonds.

d. form salt bridges.

Give the name of the amino acid represented by each of the following abbreviations:

a. Trp

b. M

c. Prom

d. G
See all solutions

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