Research Reviews
Natural vs Synthetic Peptides: Origin and Molecular Identity
Compare natural, isolated, recombinant and chemically synthesised peptides, and separate preparation route from molecular identity and sample evidence.
Peptide Structure
Peptide sequences, backbone bonds, terminal modifications, ring connectivity and structural identity.
Research Reviews
Polypeptide vs Protein: Chains, Precursors and Processed Forms
Understand overlapping peptide and protein terminology, and distinguish a polypeptide chain from a precursor, mature product or multichain entity.
Research Reviews
How to Read Peptide Sequences: Codes, Termini and Modifications
Read peptide sequences, compare one-letter and three-letter codes, and identify terminal modifications, stereochemistry and missing structural information.
Research Reviews
Linear vs Cyclic Peptides: Rings, Bonds and Research Comparisons
Compare linear and cyclic peptide structures, distinguish ring linkages, and assess what a stability comparison actually establishes.
Testing & Quality
Peptide Identity by Mass Spectrometry: What a Match Means
Understand peptide mass spectra, charge states, intact mass and sequence evidence, including identity questions a simple mass match cannot resolve.
Research Reviews
What Is a Peptide Bond? Structure, Formation and Examples
Understand peptide-bond structure, formation, planarity and hydrolysis, with bond-counting examples and a comparison with hydrogen and disulfide bonds.
Research Reviews
What Are Peptides? Structure, Origins and Biological Roles
Learn what peptides are, how they differ from amino acids and proteins, where they come from, and how to evaluate peptide research claims.