Stimulated emission depletion ( STED ) microscopy图像: 看看线粒体:线粒体在一般光学显微镜下就是一个小点或短棒,在共聚焦下(B)仍然是模糊的,但在STED下,哈! STED microscopy enables the analysis of submitochondrial protein distributions. ( A ) Mitochondria form a branched network within eukaryotic cells. The mitochondria (green) and the microtubule cytoskeleton (red) of PtK2 cells were labeled with antibodies specific for Tom20 and α-tubulin. The nuclei were labeled with DAPI (blue). (Scale bar: 20 μm.) ( B ) Mitochondria of PtK2 cells labeled with an antiserum against Tom20. STED microscopy ( Right ) reveals individual Tom20 clusters, which are blurred and not resolvable when using diffraction-limited confocal microscopy ( Left ). (Scale bar: 2 μm.)