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A peptide bond covalently attaches amino acids through a dehydration reaction. One amino acid's carboxyl group and another amino acid's amino group combine, releasing a water molecule. The resulting bond is the peptide bond. The products that such linkages form are peptides. As more amino acids join this growing chain, the resulting chain is a polypeptide. Each polypeptide has a free amino group at one end. This end has the N-terminal, or the amino-terminal, and the other end has a free...
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Peptide Identification Using Tandem Mass Spectrometry01:33

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Tandem mass spectrometry, also known as MS/MS or MS2, is an analytical technique that employs two mass analyzers. Essentially it is a series of mass spectrometers that helps isolate a particular biomolecule and then helps study its chemical properties.
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Cardiac biomarkers are critical in diagnosing, prognosing, and managing cardiovascular diseases. Routine measurement of specific biomarkers such as B-type natriuretic peptide (BNP), C-reactive protein (CRP), and homocysteine (Hcy) is common practice in clinical settings to evaluate heart function and predict cardiovascular events.
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Protein Digestion01:02

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Protein digestion begins in the stomach, where the highly acidic environment can easily disrupt protein structure by exposing the peptide bonds of polypeptide chains. After polypeptide chains are broken into individual amino acids by a series of digestive enzymes, the amino acids are transported to the liver via the bloodstream to produce energy.
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Related Experiment Video

Updated: Feb 9, 2026

Expression and Purification of Virus-like Particles for Vaccination
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Peptide Vaccines for Leishmaniasis.

Rory C F De Brito1,2, Jamille M De O Cardoso2, Levi E S Reis1,2

  • 1Laboratório de Pesquisas Clínicas, Programa de Pós-graduação em Ciências Farmacêuticas/CiPharma, Escola de Farmácia, Universidade Federal de Ouro Preto, Ouro Preto, Brazil.

Frontiers in Immunology
|June 6, 2018
PubMed
Summary

Developing new peptide vaccines for leishmaniases is crucial due to rising global incidence. Peptide vaccines offer advantages over traditional methods but require effective delivery strategies to enhance immunogenicity and prevent infection.

Keywords:
chimeric vaccinepeptide-based vaccinespolypeptide vaccinestegumentary leishmaniasesvisceral leishmaniasis

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Area of Science:

  • Immunology
  • Vaccinology
  • Parasitology

Background:

  • Leishmaniases incidence is increasing globally, necessitating novel prophylactic vaccine development.
  • Traditional vaccines using whole parasites or subunits have significant drawbacks.
  • Peptides offer a promising alternative for leishmaniasis vaccine design due to stability and cost-effectiveness.

Purpose of the Study:

  • To review current and future strategies for peptide-based vaccines against leishmaniases.
  • To discuss the benefits and limitations of peptide vaccines.
  • To propose methods for overcoming peptide vaccine weaknesses.

Main Methods:

  • Review of existing literature on peptide-based vaccine approaches for leishmaniases.
  • Analysis of strategies combining peptides with adjuvants, viral vectors, and nanotechnology.
  • Discussion of chimeric, polypeptide, and nanovaccine designs.

Main Results:

  • Peptide vaccines present advantages like stability and low cost but often exhibit poor immunogenicity alone.
  • Various delivery systems, including adjuvants, cellular vaccines, and nanovaccines, are being explored to enhance peptide immunogenicity.
  • Recent advancements focus on sophisticated designs like chimeric and nanovaccines for targeted immune responses.

Conclusions:

  • Peptide-based vaccines hold significant potential for preventing leishmaniases, but challenges in immunogenicity must be addressed.
  • Innovative delivery systems and vaccine designs are key to overcoming the limitations of peptide vaccines.
  • Further research into synthetic vaccine development is recommended to establish effective leishmaniasis prevention strategies.