What type of resin was used in the chromatography column?

What type of resin was used in the chromatography column?

• A. Hydrophobic.
• B. Anion-exchange.
• C. Cation-exchange.
• D. Size-exclusion.

Answer: (A)

Resin choice in chromatography is guided by what drives the binding between the protein and the solid phase. Hydrophobic interaction chromatography uses a resin with nonpolar groups to capture proteins based on exposed hydrophobic regions on their surfaces. At high salt concentrations, these hydrophobic interactions are strengthened, so the target protein binds the resin; washing removes loosely bound contaminants, and then lowering the salt or changing the solvent disrupts the hydrophobic interactions to elute the protein. In contrast, resins that rely on charge separation (anion- or cation-exchange) or on size exclusion operate by very different principles and would require different conditions to bind and release proteins. The described setup aligns with hydrophobic resin behavior, so the resin used is hydrophobic.

Resin choice in chromatography is guided by what drives the binding between the protein and the solid phase. Hydrophobic interaction chromatography uses a resin with nonpolar groups to capture proteins based on exposed hydrophobic regions on their surfaces. At high salt concentrations, these hydrophobic interactions are strengthened, so the target protein binds the resin; washing removes loosely bound contaminants, and then lowering the salt or changing the solvent disrupts the hydrophobic interactions to elute the protein. In contrast, resins that rely on charge separation (anion- or cation-exchange) or on size exclusion operate by very different principles and would require different conditions to bind and release proteins. The described setup aligns with hydrophobic resin behavior, so the resin used is hydrophobic.