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Home / July 4th, 2009; Vol.176 #1 / Protein caught in the act / File
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In certain fruit fly tissues, the protein Cdc42 is more active 15 hours after the embryo is formed than 11 hours after formation. Red indicates high activity, and blue indicates low activity. The yolk — indicated by a dotted outline — glows pink and white in some of these images, even without protein activation. Credit: Kamiyama and Chiba, Science/AAAS, 2009


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