Overexpression is a research area that involves increasing the expression levels of a specific gene or protein in a cell or organism. This can be achieved through various methods such as gene amplification, gene transfection, or using viral vectors. Overexpression studies are commonly used to investigate the function of a particular gene or protein, understand its role in cellular processes, and explore its potential therapeutic applications. By artificially increasing the expression levels of a gene or protein, researchers can gain insights into its normal function, interactions with other molecules, and effects on cell behavior. This research area is important in the fields of molecular biology, genetics, and biotechnology.