Kinetin, a cytokinin and plant hormone, is a cell division factor found in plant parts and yeast. Kinetin has also been detected in freshly extracted DNA from human cells.
Plant hormones, or cytokinins, were named for their ability to stimulate cell division (cytokinesis). The first known cytokinin was a component of coconut milk. This was used as a standard additive to plant tissue cultures in the lab because of its ability to make plant cells divide. Cytokinins were eventually isolated from coconut milk, immature organs of corn, and various other sources. Studies dating back to the mid-1950s describe the structure and synthesis of kinetin specifically.