Which substance is not commonly used as a support medium for serum protein electrophoresis?

Which substance is not commonly used as a support medium for serum protein electrophoresis?

• A. Agarose gel
• B. Cellulose acetate
• C. Acrylamide
• D. Celite

Answer: (D)

The idea being tested is which materials can form a stable support matrix for separating serum proteins by electrophoresis. An effective support medium must create a uniform, porous network that stays intact under an electric field and provides predictable migration of proteins based on charge and size. Agarose gel, cellulose acetate, and acrylamide all create such networks. Agarose provides a porous gel that allows proteins to move at different rates, making it a common choice for serum protein electrophoresis. Cellulose acetate offers a solid, planar support surface that conducts the separation of serum fractions in many clinical setups. Acrylamide forms a robust polyacrylamide gel with a tight, controllable pore structure, enabling high-resolution separation of proteins when needed. Celite, by contrast, is a filtration aid made of diatomaceous earth used to clarify solutions or as a carrier in certain filtration processes. It does not form a continuous, stable matrix under an electric field and would not support consistent protein separation, so it is not used as a support medium for serum protein electrophoresis.

The idea being tested is which materials can form a stable support matrix for separating serum proteins by electrophoresis. An effective support medium must create a uniform, porous network that stays intact under an electric field and provides predictable migration of proteins based on charge and size.

Agarose gel, cellulose acetate, and acrylamide all create such networks. Agarose provides a porous gel that allows proteins to move at different rates, making it a common choice for serum protein electrophoresis. Cellulose acetate offers a solid, planar support surface that conducts the separation of serum fractions in many clinical setups. Acrylamide forms a robust polyacrylamide gel with a tight, controllable pore structure, enabling high-resolution separation of proteins when needed.

Celite, by contrast, is a filtration aid made of diatomaceous earth used to clarify solutions or as a carrier in certain filtration processes. It does not form a continuous, stable matrix under an electric field and would not support consistent protein separation, so it is not used as a support medium for serum protein electrophoresis.