3 hr zebrafish embryo labeled with anti-phosphotyrosine antibody (green) and anti-phosphoserine (red). Images made available by Mark Cooper thru The Zebrafish A Living Laboratory.

Human umbilical vein endothelial cells stained initially for nuclei with DAPI (blue) and for vascular endothelial cadherin (red).

Human umbilical vein endothelial cells stained initially for nuclei with DAPI (blue) and for vascular endothelial cadherin (red)

Projection of a HeLa cell expressing a YFP-SC35 fusion protein that localizes to nuclear speckles and in a diffuse nuclear localization. Image stack was acquired using a Deltavision deconvolution micr...

Molecules designed to block the expanded CAG repeats characteristic of Huntington's disease fluoresce blue in these cultured cells and prevent the expression of the mutant proteins that cause the di...

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...

Z-stack through an unidentified pollen (mixed pollen grain w.m.; Carolina, commercial sample), with 200 image planes. See accompanying image in this group for a colorized maximum projection.

A confocal micrograph of stained and autofluorescent cells of xylem in the stem of buttercup (Ranunculus), showing xylem vessels whose walls are studded with pits that allow passage of water from one ...

A confocal image of breast cancer cells in culture. The cell to the lower left is dying.

Fluorescent micrograph showing the mitotic spindle, which is composed of microtubules. During cell division the chromosomes duplicate and are pulled to opposite poles by the spindle, once the chromoso...