Gel Filtration
Gel Filtration — A size exclusion chromatography technique using a gel matrix to separate molecules by size, commonly used for peptide desalting and buffer exchange.
What Is Gel Filtration?
Gel filtration is another name for size-exclusion chromatography (SEC), separating peptides by hydrodynamic size using porous agarose or polyacrylamide beads. Larger molecules elute first (excluded from pores); smaller molecules elute later (enter pores). Gel filtration is non-denaturing and preserves peptide bioactivity.
Applications
- Desalting: Rapid buffer exchange on PD-10 or G-25 columns
- Aggregate analysis: Analytical SEC quantifies monomer vs. dimer vs. higher-order aggregates
- MW estimation: Calibration with known MW standards estimates peptide hydrodynamic size
Frequently Asked Questions
What is Gel Filtration?
A size exclusion chromatography technique using a gel matrix to separate molecules by size, commonly used for peptide desalting and buffer exchange.
Why is Gel Filtration important in peptide research?
Gel Filtration 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
- Gel Filtration on Wikipedia
- Search Gel Filtration on PubChem (NIH)
- Research articles on ScienceDirect