Southern Blotting Explained: Principle, Procedure, Applications, Advantages & Modern Alternatives (Complete Guide)
Introduction Southern blotting is one of the most important molecular biology techniques used for the detection and analysis of specific DNA sequences within a complex DNA sample. Developed by British molecular biologist Edwin Southern in 1975, this technique revolutionized genetic research by allowing scientists to identify particular genes, DNA fragments, and genetic variations. The method involves separating DNA fragments based on size through gel electrophoresis , transferring them onto a membrane, and detecting the target sequence using a labeled complementary DNA probe . Even with the advancement of PCR , qPCR , and next-generation sequencing (NGS), Southern blotting remains a valuable technique because it provides information about DNA size, copy number, genome organization , and structural variations . What is Southern Blotting? Southern blotting is a molecular hybridization technique used to detect a specific DNA sequence in a mixture of DNA molecules. The process...