Shown is a a confocal microscope image of a human gingival fibroblast in culture. Interphase microtubules (green) are labeled with alpha/beta tubulin primary antibodies. FITC conjugated secondary antibody was applied afterwards. The centrosomal protein pericentrin was labeled with anti-pericentrin followed by Cy3 conjugated secondary antibody and appears as a pair of red juxtanuclear signals (red). Nuclear DNA (blue) was stained with Hoechst33242.