The hydrophobic interactions of the ion-exchanger resin ligands with proteins at high salt concentrations by adsorption isotherms and isothermal titration calorimetry

Wen Yih Chen, Zhen Chia Liu, Po Hsun Lin, Chiung I. Fang, Shuichi Yamamoto

Research output: Contribution to journalArticlepeer-review

46 Scopus citations

Abstract

This investigation attempts to examine the hydrophobic interactions of ion-exchanger's ligand on protein adsorption at mild to high ionic strengths in solution. Adsorption isotherms and enthalpies of lysozyme and myoglobin on cation exchanger resin (CM-Sepharose, SP-Sepharose and SOURCE 30S) were measured at selected ionic strengths of phosphate buffer. Binding enthalpies showed that adsorption occurs mainly by hydrophobic interaction at high ionic strength. The investigation found the binding affinities and enthalpies were ligand-dependent and CM-Sepharose contains the most hydrophobic ligand among those studied. Results of this study provide further insight into the hydrophobic effect of ion-exchange resin on chromatography applications for protein purification under high ionic strength conditions.

Original languageEnglish
Pages (from-to)212-219
Number of pages8
JournalSeparation and Purification Technology
Volume54
Issue number2
DOIs
StatePublished - 1 Apr 2007

Keywords

  • Adsorption enthalpy
  • Hydrophobic interaction
  • Ion-exchange resin
  • Isothermal titration calorimetry

Fingerprint

Dive into the research topics of 'The hydrophobic interactions of the ion-exchanger resin ligands with proteins at high salt concentrations by adsorption isotherms and isothermal titration calorimetry'. Together they form a unique fingerprint.

Cite this