Electrophoresis May 2026

The standard method for separating DNA fragments, often used after a PCR (Polymerase Chain Reaction) to verify results.

An electrical current is applied. Since DNA and RNA are negatively charged due to their phosphate backbone, they migrate toward the positive electrode (anode). Electrophoresis

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

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 Uses narrow tubes instead of gels, allowing for

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

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

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.