CIL:34537, Tetrahymena pyriformis, cell by organism, eukaryotic cell, Eukaryotic Protist, Ciliated Protist. In Cell Image Library

High resolution image of the nucleoli of the macronucleus. Nucleoli have a core of DNA that contains the genes that are transcribed into ribosomal RNA. Assembly of the ribosomal subunits from this processed RNA and from proteins transported into the nucleus through the pores occurs in the nucleoli. A concentric stack of rough ER encircles a mitochondrion. TEM taken on 8/16/67 by R. Allen with Philips 200 operating at 60kV. Neg. 7,200X. The raw film was scanned with an Epson Perfection V750 Pro. This image is best used for quantitative analysis.