Mutagenesis (molecular biology technique)

In molecular biology, mutagenesis is an important laboratory technique whereby DNA mutations are deliberately engineered to produce libraries of mutant genes, proteins, strains of bacteria, or other genetically modified organisms. The various constituents of a gene, as well as its regulatory elements and its gene products, may be mutated so that the functioning of a genetic locus, process, or product can be examined in detail.

Source: Wikipedia — Mutagenesis (molecular biology technique) (CC BY-SA 4.0)