3-D Model of rMTOC Arrangement (IMAGE) University of Leicester Caption In the model, microtubules are green. A structure called the spindle pole bodies (SPBs) are modeled in blue. The nuclear envelope is shown in magenta. In the wild-type cells, numbers of microtubules are emanating from the area just above the SPB. We refer this area as the radial microtubule organizing center (rMTOC). Credit European Molecular Biology Laboratory, Heidelberg/University of Leicester Usage Restrictions Use only with credit. 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.