Co-Solvent
Co-Solvent — A secondary solvent added to improve peptide solubility, such as DMSO or acetic acid mixed with aqueous buffer for hydrophobic peptides.
What Is a Co-Solvent?
A co-solvent is a secondary solvent added to an aqueous system to improve peptide solubility, stability, or reaction efficiency. Hydrophobic peptides that are poorly soluble in water often require co-solvents for initial dissolution before dilution into aqueous buffers for biological use.
Common Co-Solvents
- DMSO: Most common peptide co-solvent. Dissolves most hydrophobic peptides. Biocompatible up to 1-5% in cell assays
- Acetonitrile: Used in HPLC mobile phases and for initial dissolution. Evaporates easily
- DMF: Strong peptide solvent used in SPPS. Not biocompatible
- Acetic acid (10%): Dissolves basic and some neutral peptides. Biocompatible
Frequently Asked Questions
What is Co-Solvent?
A secondary solvent added to improve peptide solubility, such as DMSO or acetic acid mixed with aqueous buffer for hydrophobic peptides.
Why is Co-Solvent important in peptide research?
Co-Solvent is a fundamental concept in reagent as it relates to peptide science. It directly influences experimental design, compound characterization, and the reliability of research outcomes across biochemistry and molecular biology disciplines.