Abstract
1. Polysomes, ribosomes and pH5 enzymes were isolated from rabbit reticulocytes by acidifying the post-mitochondrial supernatant to pH6·0 to precipitate all ribonucleoprotein particles and about half the pH5 enzymes; the precipitate was redissolved in buffer, pH7·6, and fractionated by zone centrifuging. 2. The isolation of polysome-rich and ribosome-rich fractions from the post-mitochondrial supernatant was also examined. 3. Studies of the stability of polysomes revealed that dissociation into sub-units occurred when both bound and free Mg2+ was chelated by EDTA or when the pH was increased above pH8·8.
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- ARNSTEIN H. R., COX R. A., HUNT J. A. Function of polyuridylic acid and ribonucleic acid in protein biosynthesis by ribosomes from mammalian reticulocytes. Nature. 1962 Jun 16;194:1042–1044. doi: 10.1038/1941042a0. [DOI] [PubMed] [Google Scholar]
- Arnstein H. R., Cox R. A., Hunt J. A. The function of high-molecular-weight ribonucleic acid from rabbit reticulocytes in haemoglobin biosynthesis. Biochem J. 1964 Sep;92(3):648–661. doi: 10.1042/bj0920648. [DOI] [PMC free article] [PubMed] [Google Scholar]
- BORSOOK H., FISCHER E. H., KEIGHLEY G. Factors affecting protein synthesis in vitro in rabbit reticulocytes. J Biol Chem. 1957 Dec;229(2):1059–1070. [PubMed] [Google Scholar]
- GROS F., HIATT H., GILBERT W., KURLAND C. G., RISEBROUGH R. W., WATSON J. D. Unstable ribonucleic acid revealed by pulse labelling of Escherichia coli. Nature. 1961 May 13;190:581–585. doi: 10.1038/190581a0. [DOI] [PubMed] [Google Scholar]
- HAMILTON M. G., PETERMANN M. L. Ultracentrifugal studies on ribonucleoprotein from rat liver microsomes. J Biol Chem. 1959 Jun;234(6):1441–1446. [PubMed] [Google Scholar]
- Schweet R., Lamfrom H., Allen E. THE SYNTHESIS OF HEMOGLOBIN IN A CELL-FREE SYSTEM. Proc Natl Acad Sci U S A. 1958 Oct 15;44(10):1029–1035. doi: 10.1073/pnas.44.10.1029. [DOI] [PMC free article] [PubMed] [Google Scholar]
- TS'O P. O., VINOGRAD J. Studies on ribosomes from reticulocytes. Biochim Biophys Acta. 1961 Apr 29;49:113–129. doi: 10.1016/0006-3002(61)90875-7. [DOI] [PubMed] [Google Scholar]
- WARNER J. R., KNOPF P. M., RICH A. A multiple ribosomal structure in protein synthesis. Proc Natl Acad Sci U S A. 1963 Jan 15;49:122–129. doi: 10.1073/pnas.49.1.122. [DOI] [PMC free article] [PubMed] [Google Scholar]
- WETTSTEIN F. O., STAEHELIN T., NOLL H. Ribosomal aggregate engaged in protein synthesis: characterization of the ergosome. Nature. 1963 Feb 2;197:430–435. doi: 10.1038/197430a0. [DOI] [PubMed] [Google Scholar]
- Warner J. R., Rich A., Hall C. E. Electron Microscope Studies of Ribosomal Clusters Synthesizing Hemoglobin. Science. 1962 Dec 28;138(3548):1399–1403. doi: 10.1126/science.138.3548.1399. [DOI] [PubMed] [Google Scholar]