The DNA Visualizer Solution in this kit dose not contain ethidium bromide as DNA-staining dye. Although the sensitivity of DNA detection with DNA Visualizer Solution is less than the method of ethidium bromide and UV light exposure, DNA is detectable as much as 50 ng. Using this kit, DNA can be excised under visible light and higher cloning efficiency than using ethidium bromide and UV light can be provided. The excised DNA with this kit can be purified by organic solvent extraction or with other commercial kits. (All tested commercial kits worked well.)