Selectable marker

A gene whose expression allows one to identify cells that have been transforrned or transfected with a vector containing the marker gene. (See B\-Lactamase, Kanr.)

A gene whose expression allows the identification of a specific trait or gene in an organism.

A gene, usually encoding resistance to an antibiotic, added to a vector construct to allow easy selection of cells that contain the construct from the large majority of cells that do not.