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July 26, 2021 Monday 06:34:49 PM IST

Natural Rainbow Colours Produced

Science Innovations

Researchers at Korea Advanced Institute of Science and Technology (KAIST) has successfully produced rainbow colours naturally by engineering bacterial strains capable of producing three carotenoids and four violacein derivatives. It involved using metabolic engineering and membrane engineering strategies for the production of seven natural rainbow colourants in engineered Escherichia coli strains. Colorants are widely used in our lives and are directly related to human health when we eat food additives and wear cosmetics. However, most of these colorants are made from petroleum, causing unexpected side effects, health problems and environmental issues such as water pollution from dyeing of fabric. Nee for natural colorants using microorganisms has increased, but could not be readily realized due to the high cost and low yield of the bioprocesses.