| Popis: |
The formation of ribosomes in eucaryotes requires simultaneous synthesis of four rRNAs and more than 70 ribosomal proteins (rP). In procaryotes the rP genes are clustered in large operons and their coordinate expression could be regulated at few control sites. In yeasts as in other eucaryotes these genes are scattered over the genome and their messenger RNAs are monocistronic. Most of the rP genes contain an intron, which are rare in yeasts. It seems that many of the rP genes are duplicated and both copies are expressed (see Warner, 1982; Fried and Warner, 1984). |
