Abstract
Rough endoplasmic reticulum was reconstituted from free polyribosomes and rough membrane stripped from its ribosomes by KCl and puromycin. The reconstituted rough membrane resembled the native rough membrane in the following aspects: RNA/protein ratio, buoyant density in a continuous sucrose gradient, amino acid incorporation capacity and sensitivity towards protein synthesis inhibitors. When the reconstitution was done with double labelled polyribosomes ([32-P] polyribosomes, [3-H] leucine labelling of nascent peptide chain before or after the attachment of the polyribosomes to the membrane) both labels banded together with the reconstituted rough membrane band. Hybrid rough membrane could be formed from rat liver stripped rough membrane and wheat germ ribosomes. This hybrid membrane could translate globin mRNA.
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