In "Escherichia coli", AI-2 is produced by the lsr operon, encoding an ABC transporter which imports AI-2 into the cells during the early stationary (latent) phase of growth.
In "Escherichia coli", AI-2 is produced and processed by the "lsr" operon. Part of it encodes an ABC transporter which imports AI-2 into the cells during the early stationary (latent) phase of growth.