The nucleolinus is a eukaryotic cell structure which is still not well characterised. Its properties make it difficult to study.
We know, nevertheless, that it is made up at least in part of RNA and that it is located close to the nucleolus in the nucleus of some cells.
New work has shown that it appears to be involved in cell division by binding to the centrosome and mitotic bundle.
The nucleolinus is one of the cell structures which make up the eukaryotic cell, within the nucleus (orange). Credit: UCLA/California NanoSystems Institute