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.

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.

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

is a fundamental laboratory technique used to separate macromolecules—specifically DNA, RNA, and proteins—based on their size and electrical charge . By applying an electric field to a buffered medium, scientists can "sort" complex biological mixtures into distinct bands, making it an indispensable tool in genetics, forensics, and clinical diagnostics. How It Works

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.

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.

It is used to detect abnormal proteins in blood or urine, which can indicate conditions like multiple myeloma or hemoglobin disorders (e.g., sickle cell anemia).