Abstract
The rate of synthesis of ribosomal protein increased immediately following a nutritional shift-up in Escherichia coli ; while the rate of synthesis of elongation factors did not increase until 5–10 minutes had elapsed. The relative rates of synthesis of EFG and EFTs were constant at all times following shift-up. This constancy was not maintained between elongation factors and ribosomal protein early during shift-up. These data suggest that ribosomal and elongation factor proteins are not co-ordinately synthesized and argue against the postulate that their genes are part of one polycistron.
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