Because if you can get the gene for green fluorescent protein and deliver it to a cell, that cell will glow green -- or any of the many variants now of green fluorescent protein, you get a cell to glow many different colors.
Można pobrać gen tego białka i dostarczyć go do komórki, a ta komórka zaświeci się na zielono. Albo inne białko fluorescencyjne. Wtedy komórka zaświeci na rożne kolory.