Equilibrium Dialysis
Equilibrium Dialysis — A technique for measuring binding affinity by separating free and bound ligand across a semi-permeable membrane at equilibrium.
What Is Equilibrium Dialysis?
Equilibrium dialysis is the gold standard technique for measuring free vs. bound peptide concentration. A semipermeable membrane separates peptide + target protein from a buffer-only chamber. At equilibrium, the buffer side contains only free peptide, while the protein side contains both free and bound peptide.
Applications
- Plasma protein binding: Determines fraction of peptide bound to serum albumin
- Kd measurement: True solution-phase binding constant without surface artifacts
- MWCO: Membrane cutoff chosen to retain target but pass free peptide (typically 5-10 kDa)
Frequently Asked Questions
What is Equilibrium Dialysis?
A technique for measuring binding affinity by separating free and bound ligand across a semi-permeable membrane at equilibrium.
Why is Equilibrium Dialysis important in peptide research?
Equilibrium Dialysis is a fundamental concept in analytical 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.
Authority Sources
- Equilibrium Dialysis on Wikipedia
- Search Equilibrium Dialysis on PubChem (NIH)
- Research articles on ScienceDirect