Back تعدد أطوال جزء الحصر Arabic Polimorfizam dužine restrikcijskih fragmenata BS Polimorfisme de longitud del fragment de restricció Catalan Polymorfismus délky restrikčních fragmentů Czech Restriktionsfragmentlängenpolymorphismus German Polimorfismos de longitud de fragmentos de restricción Spanish چندریختی طول قطعه بریدهشده Persian DNA:n katkoskirjo Finnish Polymorphisme de longueur des fragments de restriction French Polamorfacht i bhfad na mbloghanna gearrtha Irish
In molecular biology, restriction fragment length polymorphism (RFLP) is a technique that exploits variations in homologous DNA sequences, known as polymorphisms, populations, or species or to pinpoint the locations of genes within a sequence. The term may refer to a polymorphism itself, as detected through the differing locations of restriction enzyme sites, or to a related laboratory technique by which such differences can be illustrated. In RFLP analysis, a DNA sample is digested into fragments by one or more restriction enzymes, and the resulting restriction fragments are then separated by gel electrophoresis according to their size.
RFLP analysis is now largely obsolete due to the emergence of inexpensive DNA sequencing technologies, but it was the first DNA profiling technique inexpensive enough to see widespread application. RFLP analysis was an important early tool in genome mapping, localization of genes for genetic disorders, determination of risk for disease, and paternity testing.