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Free polysomes and a mixture of free and membrane-attached polysomes were isolated separately from rat liver, and each was added to a cell-free, protein-synthesizing system. The free polysomes showed a greater capacity than the mixed polysome population for incorporation of (14)C-leucine into ferritin, whereas the reverse was true for (14)C-leucine incorporation into albumin.
Hicks et al. (Fri,) studied this question.