Prion protein can be infectious, spreading from cell to cell in the brain. Here four nerve cells in a mouse illustrate how infectious prion protein moves within cells along neurites — wire-like connections the nerve cells use for communicating with adjacent cells.
Harvard University student Elana Simon introduces President Obama before he spoke at the White House Friday about an initiative to encourage research into more precise medicine.
Mandel Ngan/AFP/Getty Images
A scorpion fly perches on a leaf at the research farm where Lindgren studied the decomposition of human remains. Scorpion flies are among the first insects to visit a corpse.
Courtesy of Natalie Lindgren
Dr. Richard Schlegel and postdoctoral fellow Nancy Palechor-Ceron use a microscope to look at human epithelial cells growing on mouse fibroblasts at Georgetown University Medical Center.
Lauren Wolkoff/Georgetown University