Electrophoresis < 720p 2024 >

Used for proteins. The detergent SDS unfolds the proteins and gives them a uniform negative charge, ensuring they are separated strictly by length rather than shape.

The process relies on the principle that many biological molecules possess an electrical charge. When placed in an electric field, these molecules migrate toward the electrode with the opposite charge.

Small molecules move through the pores of the gel quickly, while larger molecules get tangled in the matrix and move more slowly. Over time, the molecules separate into distinct bands based on their molecular weight. Common Types Electrophoresis

Molecules are loaded into a porous gel, typically made of agarose (for large DNA fragments) or polyacrylamide (for smaller DNA or proteins). This gel acts as a molecular sieve.

Electrophoresis is the backbone of several critical scientific fields: Used for proteins

Uses narrow tubes instead of gels, allowing for high-speed separation and automation, commonly used in modern DNA sequencing. Real-World Applications

Though the concept is simple—using electricity to push molecules through a "filter"—electrophoresis is one of the most powerful techniques in modern science. It transformed biology from a descriptive field into a precise, molecular discipline, providing the visual evidence needed to map the human genome and solve complex medical mysteries. When placed in an electric field, these molecules

Researchers use it to isolate specific genes for cloning or to study mutations. Conclusion