Glossary
Trifluoroacetate (TFA) salt
A common counter-ion left over from peptide purification. It adds mass to the vial, which is why net peptide content is lower than total weight.
Further reading
- TFA vs acetate peptide salts: why the counter-ion matters
Synthetic peptides are supplied as salts. What trifluoroacetate and acetate counter-ions are, why they change net content and when the choice matters.
- How research peptides are made and tested
From solid-phase synthesis to preparative HPLC, freeze-drying and quality control: what happens between an amino acid sequence and a vial.
See also
For laboratory research only. Nothing on peptide.wiki is medical advice. The compounds described are not for human or veterinary use, and research-grade material is not a medicine.