DAVID M. PHILLIPS / SCIENCE PHOTO LIBRARY DAVID M. PHILLIPS / SCIENCE PHOTO LIBRARY
Colour enhanced Transmission Electron Micrograph (TEM) showing nucleolema, the irregular network of fine ribonucleoprotein granules or microfilaments forming most of the nucleolus. The nucleolus is a non-membrane bound structure composed of proteins and nucleic acids found within the cell's nucleus. Magnification unknown.
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