منابع مشابه
Structure and function of transfer ribonucleic acid. 3. Some properties of a complex between valyl transfer ribonucleic acid synthetase and transfer ribonucleic acid specific for valine.
The formation and some properties of a stable complex between valyl transfer ribonucleic acid synthetase and transfer RNA from yeast have been investigated by three different methods for the isolation of the complex: titration over Sephadex, sucrose gradient centrifugation, and electrophoresis on Pevikon as supporting medium. Transfer RNA specific for valine (tRNAvsl) can be separated into two ...
متن کاملThe secondary structure of ribosomal ribonucleic acid in solution.
1. The u.v.-absorption spectrum of ribosomal RNA from rabbit reticulocytes was studied as a function of temperature at different pH values. The changes in the spectrum over the range 220-320mmu were interpreted on the basis of the assumption that the effect of denaturation and ionization are additive. The results suggest that in neutral salt solutions the secondary structure of the ribosomal RN...
متن کاملHelical nucleocapsid structure of the oncogenic ribonucleic acid viruses (oncornaviruses).
Negative staining of virions and isolated nucleoids from avian myeloblastosis virus, murine leukemia virus, murine mammary tumor virus, and feline leukemia virus reveals common internal structures. The majority of virions that are penetrated by phosphotungstate show spherical nucleoids with no apparent symmetry. In a small percentage of virions, two distinctive structures are found: (i) single ...
متن کاملStructure and function of transfer ribonucleic acid. IV. Complexes between valyl transfer ribonucleic acid synthetase and structurally modified transfer ribonucleic acid specific for valine.
The formation of a stable complex between valyl transfer ribonucleic acid synthetase from yeast and transfer RNA specific for valine (tRNAVa’) from the same source has been used as a model for the recognition between enzyme and tRNA. With the use of sucrose gradient centrifugation to isolate the complex, the major fraction of tRNAVal (tRNAp’) was found to retain its ability to form a stable com...
متن کاملRibonucleic acid metabolism in lymphocytes stimulated by phytohemagglutinin. II. Rapidly synthesized ribonucleic acid and te production of ribosomal ribonucleic acid.
Human peripheral lymphocytes are stimulated to change, in vitro, from a resting state to one of progressive enlargement, culminating in mitosis, by treatment with Phaseolus vulgaris phytohemagglutinin. The sedimentation characteristics and fate of rapidly synthesized RNA have been studied in this system after 20 hours of stimulation with phytohemagglutinin, a time when RNA synthesis has been ac...
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ژورنال
عنوان ژورنال: Nature
سال: 1951
ISSN: 0028-0836,1476-4687
DOI: 10.1038/168406a0