Centrioles move either along the nuclear envelope or along microtubules containing α-Tubulin. A) Centriole moving along the nuclear envelope in a centrin1-EGFP HeLa cell. The images shown are an overlay of centrin1-EGFP (green) and DIC. An arrow indicates mobile centrioles migrating along the nuclear envelope. The nuclear envelope is emphasized with a blue dotted line. B) A dividing HeLa cell showing centrioles that leave the cell pole and migrate through the cell center towards the intercellular bridge along microtubules. White arrows point at centrioles migrating along α-Tubulin towards the intercellular bridge.