A mixture of cytoplasmic (80S) and chloroplast (70S) ribosomes from Chlamydomonas reinhardtii was freed of contaminating membranes by sedimentation of the postmitochondrial supernatant through a layer ...
Rat liver nuclei, after preliminary isolation in 2.2 molar sucrose solution, were separated into density classes by centrifugation at 95,000 g for 45 to 85 minutes in a sucrose density gradient ...
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