par Thomas, Christian 
Référence Biochimica et biophysica acta, N. Nucleic acids and protein synthesis, 224, 1, page (99-113)
Publication Publié, 1970-11
Référence Biochimica et biophysica acta, N. Nucleic acids and protein synthesis, 224, 1, page (99-113)
Publication Publié, 1970-11
Article révisé par les pairs
| Résumé : | 1. 1. More than 80 % of the RNA of small oöcytes of Xenopus laevis is 4-S RNA. 2. 2. Several constituents distinguishable by means of methylated-albumin column chromatography are found in this RNA and are present in two different ribonucleoproteic fractions, the sedimentation constants of which are, respectively, 5-6 S and about 20 S. 3. 3. The ribonucleoproteic fractions are also heterogeneous, as shown by CsCl gradient analyses and [3H]uridine incorporation; they appear from electron microscopic observations to be composed of many fibrils about 100 Å long, like those one can observe "in situ" in sections of small oöcytes. 4. 4. At this stage, oöcytes contain very few ribosomes and ribosomal RNA. 5. 5. The possible nature and function of this low molecular weight RNA are discussed. © 1970. |
