Alpha-tubulin Cell Division (IMAGE) Allen Institute Caption A cluster of human induced pluripotent stem cells (hiPSCs) highlighted with dyes that detail cell membranes (purple) and DNA in the nucleus (blue). Spindles from microtubules (white), seen in the center of the image, aid in cell division. Credit Allen Institute for Cell Science Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.