๐”– Bobbio Scriptorium
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The molecular weights of yeast ribosomal precursor RNAs

โœ Scribed by R. C. Brand; R. J. Planta

Publisher
Springer
Year
1975
Tongue
English
Weight
266 KB
Volume
2
Category
Article
ISSN
0301-4851

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โœฆ Synopsis

The molecular weights of the predominant rRNA precursors as well as those of 26-S and 17-S mature rRNA from Saccharomyces carlsbergensis were determined by polyacrylamide gel electrophoresis in the presence of formamide. Mature 26-S + 5.8-S rRNA was found to have a molecular weight of 1.24 โ€ข 106 while their immediate precursor, 29-S RNA, had a molecular weight of 1.52 โ€ข 106 . Values of 0.70 โ€ข 106 and 0.82 โ€ข 106 were obtained for the molecular weights of mature 17-S rRNA and its 18-S precursor. Finally the 37-S precursor, common to both 29-S and 18-S RNA, was found to have a molecular weight of 2.80 X 106 . Each precursor rRNA, therefore, contains extra sequences not found at the next stage of maturation.

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