Abstract
The age-related reduction in cell-free synthesis in the free-living nematode Turbatrix aceti is due to a defect in the ribosomes. Addition of young ribosomal wash or use of young medium does not improve the activity of old, run-off ribosomes in the presence of phenylalanine and poly(U). It appears that some of the old ribosomes are incapable of binding the EF-1-GTP-aminoacyl-tRNA complex. These ineffective ribosomes are present in the 80 S (monosomal) fraction. Old ribosomes obtained from polysomes appear to bind normally.
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