Ribosomes from Xenopus laevis ovaries and the polyuridylic acid-directed biosynthesis of polyphenylalanine
- 1 September 1970
- journal article
- Published by Portland Press Ltd. in Biochemical Journal
- Vol. 119 (2) , 161-164
- https://doi.org/10.1042/bj1190161
Abstract
Single ribosomes account for 90% or more of the ribosome fraction of Xenopus laevis ovaries. These ribosomes have low endogenous activity in a cell-free protein-synthesizing system but synthesize polyphenylalanine in the presence of poly U under conditions comparable with those reported for mammalian or bacterial systems. These observations agree with the view that the ribosome is deficient in mRNA.Keywords
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