Capillary Electrophoresis
Capillary Electrophoresis — A high-resolution separation technique using narrow-bore capillaries and electric fields, capable of resolving closely related peptide variants.
What Is Capillary Electrophoresis?
Capillary electrophoresis (CE) separates peptides by charge-to-size ratio in a narrow-bore capillary (25-75 µm) under high voltage (10-30 kV). CE provides orthogonal separation to RP-HPLC, exceptional resolution for charge variants (deamidation, oxidation), and requires minimal sample (nanoliter injection).
CE Modes for Peptides
- CZE (capillary zone): Free solution separation by charge/size. Most common for peptide analysis
- CIEF (isoelectric focusing): Separates by pI. Resolves charge variants with ΔpI < 0.01
- CE-MS: Online coupling to mass spectrometry for identification
Frequently Asked Questions
What is Capillary Electrophoresis?
A high-resolution separation technique using narrow-bore capillaries and electric fields, capable of resolving closely related peptide variants.
Why is Capillary Electrophoresis important in peptide research?
Capillary Electrophoresis 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
- Capillary Electrophoresis on Wikipedia
- Search Capillary Electrophoresis on PubChem (NIH)
- Research articles on ScienceDirect