Which one of the following best describes why a surfactant may be included in a protein formulation?

Question

BlackTom AI · Accepted Answer

The question asks: Which one of the following best describes why a surfactant may be included in a protein formulation?
Option a: 'To solubilise any degradation products' — While solubilizing degraded fragments can be a function of certain excipients, surfactants are not primarily added to solubilize degradation products. Their main role is different, and this statement overstates or misattributes the typical primary purpose of surfactants in protein formulations.
Option b: 'To prevent aggregation' — This is the core, widely recognized reason surfactants are added to protein formulations. Surfactants can adsorb at interfaces (air–solution, packaging surfaces) and reduce interfacial tension, thereby mitigating protein–protein and protein–surface interactions that drive aggregation, especially during manufacturing and storage. This aligns with standard formulation science.
Option c: 'To induce minor denaturation of the protein to increase its stability' — Surfactants are not used to induce denaturation; in fact, denaturation generally destabilizes proteins. The goal is to preserve native structure, not to nudge it toward a mildly unfolded state, which would be detrimental and inconsistent with formulation strategies.
Option d: 'To increase adsorption to the primary packaging' — Increasing adsorption to packaging surfaces would typically be undesirable, as adsorption can lead to loss of active protein and potential surface-induced aggregation. Surfactants are used to prevent adsorption, not promote it. Therefore this option describes the opposite of a protective mechanism.
In summary, the primary justified role of a surfactant in many protein formulations is to prevent aggregation by mitigating interfacial and surface-related stresses, while the other options describe effects that are not typical or beneficial goals of surfactant use in this context.

Which one of the following best describes why a surfactant may be included in a protein formulation?Single choice

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