Peptide
| Formula / Notation | H₂N-CHR-CO-NH-CHR-COOH |
|---|---|
| Also Known As | Polypeptide (longer chain), oligopeptide (3-20), dipeptide (2 AA), protein (folded polypeptide) |
What is Peptide?
A peptide is a molecule consisting of two or more amino acids linked together by peptide bonds (amide bonds between the carboxyl group of one amino acid and the amino group of the next). Dipeptides contain two amino acids; oligopeptides contain 3–20; polypeptides contain many (>20). Proteins are polypeptides with a defined three-dimensional structure. Peptides are important in biological signaling and as pharmaceuticals.
Formula & Notation
Other Names / Synonyms: Polypeptide (longer chain), oligopeptide (3-20), dipeptide (2 AA), protein (folded polypeptide)
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
A peptide is a molecule consisting of two or more amino acids linked together by peptide bonds (amide bonds between the carboxyl group of one amino acid and the amino group of the next). Dipeptides contain two amino acids; oligopeptides contain 3–20; polypeptides contain many (>20). Proteins are polypeptides with a defined three-dimensional structure. Peptides are important in biological signaling and as pharmaceuticals.
Pharmaceutical drugs (insulin, oxytocin, vasopressin, cyclosporin). Food flavoring (aspartame is a dipeptide). Biological signaling molecules (hormones, neuropeptides). Antimicrobial peptides. Cosmetic ingredients. Cancer immunotherapy (peptide vaccines). Solid-phase peptide synthesis (SPPS).
Peptide drugs: allergic reactions possible. Recombinant peptides require sterile handling. Synthesis intermediates (coupling reagents like DCC, HOBt) may be toxic. Skin sensitizers possible. Proper handling of biological material required.
The formula or notation for Peptide is: H₂N-CHR-CO-NH-CHR-COOH