Movie 3

Epididymis from a B1-EGFP mouse labeled for Src. 3D reconstruction from a stack of 0.3-μm interval images, acquired using the Zeiss LSM800 confocal microscope. A “nanotube” extending from a EGFP⁺ CC apical membrane (green) contains Src (red). Nuclei are labeled with DAPI in blue.