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- W2800546 abstract "Abstract 1. The release of 5-S RNA during unfolding of the 50-S ribosomal subunit of Escherichia coli and its reassociation with the unfolded ribosome has been examined. 2. Exposure of ribosomes to 0.5–1.0 M NH4Cl, at Mg2+ concentrations of 0.1 mM or lower, results in a partial unfolding of the nucleoprotein particles; 50-S and 30-S subunits are converted to 40-S (38–42-S) and 25-S (24–26-S) components, respectively. 3. As a result of this unfolding, 85–90 % of the 5-S RNA is released from the 50-S ribosomal subunit together with 4–7 ribosomal proteins. 4. The detachment of both 5-S RNA and ribosomal proteins is reversible. When NH4Cl-treated ribosomes are refolded by dialysis against 10 mM Mg2+, the 5-S RNA and proteins released at high salt concentrations reassociate with the ribosomal particles. 5. Reattachment of 5-S RNA to 50-S subunits requires the ribosomal protein fraction released by NH4Cl. The reassociation is specific for 5-S RNA; little tRNA is bound to the ribosomes under these conditions." @default.
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- W2800546 date "1971-09-30" @default.
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- W2800546 title "Further studies on ribosome unfolding. The reversible release of 5-S RNA." @default.
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