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Questions and Answers
What type of reaction is peptide bond formation an example of?
What type of reaction is peptide bond formation an example of?
What is the term for a structure formed when a few amino acids are joined through peptide bonds?
What is the term for a structure formed when a few amino acids are joined through peptide bonds?
What is the term for the residue at the end of a peptide with a free α-amino group?
What is the term for the residue at the end of a peptide with a free α-amino group?
What is the term for the residue at the end of a peptide with a free carboxyl group?
What is the term for the residue at the end of a peptide with a free carboxyl group?
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What are molecules referred to as polypeptides generally characterized by?
What are molecules referred to as polypeptides generally characterized by?
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What is the primary reason that prevents free rotation around the peptide bond?
What is the primary reason that prevents free rotation around the peptide bond?
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Which characteristic of the peptide bond contributes to the trans configuration in the polypeptide chain?
Which characteristic of the peptide bond contributes to the trans configuration in the polypeptide chain?
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What contributes solely to the charged groups present in polypeptides?
What contributes solely to the charged groups present in polypeptides?
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Which characteristic of the peptide bond results in it being shorter than a single bond?
Which characteristic of the peptide bond results in it being shorter than a single bond?
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What allows the polypeptide chain to assume a variety of possible configurations?
What allows the polypeptide chain to assume a variety of possible configurations?
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Study Notes
Peptide Bond Formation
- Peptide bond formation is an example of a dehydration reaction.
Peptide Structure
- A few amino acids joined through peptide bonds form a structure called an oligopeptide.
- The residue at the end of a peptide with a free α-amino group is called the amino terminus or N-terminus.
- The residue at the end of a peptide with a free carboxyl group is called the carboxyl terminus or C-terminus.
Polypeptide Characteristics
- Polypeptides are generally characterized by being long chains of amino acids.
- Free rotation around the peptide bond is prevented primarily due to the partial double-bond character of the peptide bond.
Peptide Bond Characteristics
- The partial double-bond character of the peptide bond contributes to the trans configuration in the polypeptide chain.
- The charged groups present in polypeptides are solely due to the ionizable side chains of amino acids.
- The peptide bond is shorter than a single bond due to the resonance stabilization of the peptide bond.
- The peptide bond allows the polypeptide chain to assume a variety of possible configurations due to its flexibility.
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Description
Test your knowledge on peptide bond formation and condensation reactions in living cells. Learn about the process of covalently joining amino acids and the formation of dipeptides.
