The kanamycin-resistance gene is a commonly used gene in molecular biology research. It provides resistance to the antibiotic, kanamycin, which is frequently used for the selection of transformed cells in bacterial transformation experiments. There are several other terms used to describe this gene such as the kanamycin resistance cassette, KAN gene, and kanR gene. Additionally, this gene is often used in conjunction with other selectable markers such as ampicillin or chloramphenicol resistance genes, which allows for double-selection of transformed cells. Understanding the functions and synonyms of the kanamycin-resistance gene is essential for successful molecular biology experiments.