Researchers raise fruit flies (IMAGE)
Caption
Researchers raise fruit flies (Drosophila melanogaster) in large population cages, each containing about 10,000 flies (left). The flies lay eggs on grape-juice agar plates containing yeast paste, and the fertilized eggs develop into embryos (center). Researchers then collect the embryos, isolate their nuclei, and purify RNA polymerase II together with other associated proteins and molecules (right).
Credit
Courtesy of Katsuhiko Murakami / Penn State
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