Test Pattern

Each pixel of this image from a DNA microarray analysis chip represents the activity of a gene found in human tumor samples. Individual patients are represented in columns, and genes are in rows. The color of each pixel shows how active a particular gene is within the tumor, and analyzing a genome this way can help physicians determine which chemotherapy treatment will work best for a given patient.

Iron Mining

<p>Using a fleet of iron-transport proteins, modeled here as little Pac-Man shapes, the pathogenic bacterium Neisseria gonorrhoeae steals iron from its human host and transports the pilfered metal (orange balls) across the space between its outer and inner membranes. Understanding how the bacterium that causes the sexually transmitted disease gonorrhea obtains this essential nutrient could be key to fighting the disease.


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