ISSN:
1573-4927
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Chemistry and Pharmacology
Notes:
Abstract Free 80S ribosomes of eukaryotic organisms are dissociated by KCl (0.8–1.0 m) in the presence of 2-mercaptoethanol and magnesium ions (10–15mm); the large and small subunits so formed can be recombined to yield 80S monomers. We have now studied the ability of ribosomal subunits from protozoa (Tetrahymena pyriformis), fungi (Allomyces arbuscula, Saccharomyces cerevisiae), plants (pea, wheat), and mammals (rat, mouse, rabbit) to combine to form hybrid ribosomes. In general, both subunits of the species studied participate in the formation of hybrid particles, with the exception of the 60S subunit of Tetrahymena, which does not combine with the small subunit of fungal, plant, or mammalian ribosomes. The interaction of subunits from rat and Tetrahymena ribosomes has been visualized by an electron microscope study of negatively stained preparations. The base sequences of the ribosomal RNAs of these organisms have been compared to those of Saccharomyces by nucleic acid hybridization-competition.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00486098
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