Peptide glossary · Structure and synthesis
Analogue
A molecule that resembles a natural model but is changed on purpose, for example by swapping amino acids or adding a side chain. CJC-1295 is an analogue of GHRH, semaglutide one of GLP-1.
In the lab
An analogue has its own sequence and mass. For checking against the certificate of analysis, the analogue's sequence counts, not that of the natural model.
More terms: Structure and synthesis
- AcetylationAdding an acetyl group, usually at the N-terminus.
- Aib (aminoisobutyric acid)A non-proteinogenic amino acid with two methyl groups on the alpha carbon.
- AmidationReplacing the C-terminal carboxyl group with an amide.
- C-terminusThe end of a peptide with the free carboxyl group, on the right of the sequence.
- D-amino acidThe mirror image of the natural L-amino acid.
- Deletion sequenceA synthesis by-product missing one or more amino acids.
For laboratory research use only. Not for use in humans or animals.