The image to the left is a San Diego (in southern California, USA) beach scene painted using differently coloured bacteria, by Nathan Shaner and Paul Steinbach. A protein that fluoresces green was discovered in jellyfish. If you insert the gene for this protein into bacteria, then they fluoresce green. Then you can paint in green with these bacteria, using a plate covered by a layer of food that the bacteria will grow on. This green fluorescent protein has now been engineered to produce blue, yellow, etc versions so you can make and then paint with bacteria with all these colours.
Now, this is very pretty, but you may be thinking it is about as much use as these officials UEFA have put behind the goal lines in Euro2012 matches. This is not so. What reminded me of this painting is a meeting I had with my biologist collaborators at King’s College London.
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