Related Experiment Video
Updated: Jul 13, 2026
10:21
Automated Hydrophobic Interaction Chromatography Column Selection for Use in Protein Purification
Published on: September 21, 2011
Protein adsorption isotherm behavior in hydrophobic interaction chromatography
1Department of Chemical and Biological Engineering, RPI, NY 12180, USA. crames@rpi.edu
Journal of Chromatography. A
|August 19, 2007
Summary
Protein adsorption in hydrophobic interaction chromatography (HIC) shows unique patterns. Critical salt concentrations significantly impact binding for large proteins, revealing new insights into HIC behavior.
Area of Science:
- Biochemistry
- Chromatography
- Protein Science
Background:
- Hydrophobic interaction chromatography (HIC) is crucial for protein separation.
- Understanding protein adsorption isotherms is key to optimizing HIC processes.
- Protein properties and resin characteristics influence HIC performance.
Purpose of the Study:
- To evaluate protein adsorption behavior in HIC by determining isotherms.
- To investigate the impact of salt concentration, resin chemistry, and protein properties on adsorption.
- To identify unique classes of protein adsorption behavior in HIC systems.
Main Methods:
- Performed parallel batch adsorption experiments with eleven proteins on three distinct HIC resins.
- Determined protein adsorption isotherms under varying salt concentrations.
- Analyzed the effects of resin ligand chemistry and density on protein binding.
Main Results:
- Observed unique patterns in protein adsorption isotherms across different protein-resin combinations.
- Identified a "critical salt behavior" where binding increased sharply above a specific salt concentration.
- Found that larger proteins with greater hydrophobic surface area were more prone to critical salt behavior.
Conclusions:
- Protein adsorption in HIC is complex and exhibits distinct behavioral classes.
- Critical salt behavior is linked to protein size and hydrophobicity, potentially leading to surface area overlap.
- These findings enhance the understanding of protein behavior in HIC systems and aid in method development.
Related Concept Videos
01:03Affinity Chromatography
Affinity chromatography is a powerful technique extensively utilized for separating and purifying specific biomolecules from complex mixtures. It capitalizes on the highly selective binding between an analyte and its counterpart, such as antibody-antigen interactions. The counterpart is immobilized on the stationary phase, forming an affinity column. The stationary phase typically consists of solid support, such as agarose or porous glass beads, immobilizing the affinity ligand. The mobile...
01:29Adsorption Isotherms I
Adsorption isotherms are mathematical models that describe how molecules in a gas or liquid phase interact with surfaces. Two of the most common isotherm models are the Langmuir and Freundlich isotherms, which relate to Type I monolayer chemisorption. The Langmuir model is based on four key assumptions:• Adsorption cannot exceed monolayer coverage.• All surface sites are equivalent.• Molecules adsorb only at vacant sites.• There are no interactions between adsorbed molecules.Consider the...
01:09Analyte Adsorption and Distribution
In certain chromatographic separations, solutes transfer between the mobile phase and the stationary phase via sorption, which typically refers to the process of adsorption. For many chromatographic systems, the sorption process often depends on the polarity of the compounds—an expression of the overall dipole moment within the molecule. During the separation process, there is competition between the solute and solvent for adsorption to the stationary phase. Highly polar compounds and solvents...
01:29Types Of Column Chromatography
The stability and compatibility of column material with samples are crucial for efficient purification in chromatographic techniques. Various operating parameters such as pH, temperature, or solvent affect the packing of the column material, thereby determining the purification efficiency. The choice of column material also plays an essential role in deciding the operating parameters and can be modified based on the proteins that need to be purified.
Gel Filtration Chromatography
When the...
Gel Filtration Chromatography
When the...
01:10Chromatography: Introduction
Chromatography is a technique used to separate compounds based on differences of partitioning between two phases, the stationary phase and the mobile phase.
The phase in which the compounds linger or on which the compounds adsorb is called the stationary phase, whereas the mobile phase is the solvent that carries the solutes to be analyzed. In traditional column chromatography, the mixture flows through the stationary phase, and the compounds partition between the stationary and mobile phases...
The phase in which the compounds linger or on which the compounds adsorb is called the stationary phase, whereas the mobile phase is the solvent that carries the solutes to be analyzed. In traditional column chromatography, the mixture flows through the stationary phase, and the compounds partition between the stationary and mobile phases...
01:25Adsorption Isotherms II
Brunauer, Emmett, and Teller (BET) introduced a theory in 1938 that modified Langmuir's assumptions to explain multilayer physical adsorption. This theory is applicable to Type II isotherms and provides a more realistic picture of adsorption processes. The BET theory assumes a uniform solid surface with localized adsorption sites, where adsorption at one site doesn't affect adsorption at neighboring sites. This theory also allows for the possibility of additional molecules being adsorbed on top...