Nucleolus
Nucleolus is located in the nucleus of one or more spheroids sub-microstructure structure, by the higher concentration of chromatin wrapped, the outside of the membrane is not separated from the nuclear pulp. The nucleolus disappears at the early stage of cell division and is reconstructed at the end of the nucleolus region of the chromosome. Ingredients include rRNA, rDNA and ribosomal proteins, etc., is rDNA transcription sites. The main function of the nucleolus is to make and synthesize ribosomal ribonucleic acid. There are three characteristic regions identified in the nucleolus: fibrous center (FC), dense fiber component (DFC), granular component (GC). ...