Biologists often use green fluorescent protein (GFP) to see what happens inside cells. GFP, which scientists first isolated in jellyfish, is a protein that changes light from one color into another. Attaching it to other proteins allows researchers to find out if cells produce those proteins and where within cells to find them. This in turn shows how cells deliver and use genes. The problem is that this usually requires expensive equipment, such as fluorescence microscopes, and it can be time consuming. In a study published in Horticulture Research, researchers describe how a special type of GFP can be used to “see” protein production with the unaided eye. Modifying the genes of plants allowed the team to see GFP production using a simple black light to provide long-wave ultraviolet (UV) light.
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Source: Phys.org