Research Library / Fundamentals
What Is a Peptide?
Summary
A plain-language introduction to peptides: short chains of amino acids joined by peptide bonds, and how they are described in the research literature.
Key concepts
- Amino acids
- Peptide bonds
- Sequence and structure
- Peptides vs. proteins
Research context
Peptides are commonly distinguished from proteins by length, though the boundary is a convention rather than a strict rule. This article introduces the vocabulary used throughout the research library.
Evidence type
Review. Evidence labels are navigational aids. Preclinical findings do not establish human safety or efficacy.
Limitations
This is an introductory overview. It does not describe the properties, safety or effects of any specific compound.
References
Related compounds
This article is for educational and informational purposes only and is not medical advice.
How to Read a Certificate of Analysis
What a Certificate of Analysis typically contains, which fields matter, and the questions worth asking when reviewing one.
Understanding HPLC
High-performance liquid chromatography separates the components of a sample. Here is how a chromatogram is read and what it can and cannot tell you.
Understanding Mass Spectrometry
Mass spectrometry measures mass-to-charge ratios. It is a common way to check whether observed mass is consistent with an expected molecule.