DNA Visualizer Extraction Kit is manufactured for DNA purification from agarose gel without DNA damage of UV light. The Purification of DNA from agarose gel is often used for DNA-cloning work. However conventional method of visualizing DNA with ethidium bromide and exposure of UV light damages DNA and significantly decreases cloning efficiency. Using DNA Visualizer Extraction Kit, UV light exposure is not required, and DNA can be excised under visible light. Because of no UV damage, obtained DNA shows higher cloning efficiency than one using ethidium bromide and UV light. Although the sensitivity of DNA detection with DNA Visualizer Solution is less than by the method of ethidium bromide and UV light exposure, DNA is detectable as much as 50 ng by DNA excision. Purified DNA with DNA Visualizer Extraction Kit is high-quality and the DNA is suitable for many applications, such as enzyme digestion, sequencing, PCR, in vitro transcription, as well as cloning.