Translation and Regulation
The Shine-Dalgarno sequence is

a stop codon
a short sequence that acts as a ribosomal binding site
trailer sequence
the reading frame of a gene

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Translation and Regulation
A quorum sensing system

senses a compound produced by the bacterium itself
controls the activity of ribosomes directly
detects a signal from the external environment
consists of a sensor component that phosphorylates a regulatory protein

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