Electroimmobilization of proinsulin C-peptide to a quartz crystal microbalance sensor chip for protein affinity purification.

Autor: Melles E; Department of Medical Biochemistry and Biophysics, Karolinska Institutet, SE-171 77 Stockholm, Sweden., Anderson H, Wallinder D, Shafqat J, Bergman T, Aastrup T, Jörnvall H
Jazyk: angličtina
Zdroj: Analytical biochemistry [Anal Biochem] 2005 Jun 01; Vol. 341 (1), pp. 89-93.
DOI: 10.1016/j.ab.2005.03.005
Abstrakt: Proinsulin C-peptide was electroimmobilized to a quartz crystal microbalance sensor chip, localizing this low-pI peptide for covalent attachment to activated surface carboxyl groups. The resulting chip was used in a continuous flow biosensor to capture anti-C-peptide antibodies, which could subsequently be eluted in 5% formic acid between air bubbles for efficient recovery and mass spectrometric identification. The method is reproducible through repeated cycles, providing affinity purification of proteins under real-time monitoring of the binding and elution processes.
Databáze: MEDLINE