a cluster of neural cells were derived from human embryonic stem cells in the lab of university of wisconsin-madison stem. the motor neurons are shown in red; neural fibers appear green and the blue specks indicate DNA in cell nuclei.
Two interphase cells with immunofluorescence labeling of actin filaments (purple), microtubules (yellow), and nuclei (green). This image won first place in the Nikon 2003 Small World photo competition. The Cell: An Image Library - Image