The leader also codes for very short peptide sequence that is rich in leucine amino acid.

This structure forms when the cell has an excess of leucine and ribosome movement over the leader transcript is not impeded.

[1] When there is a deficiency of the charged leucyl tRNA the ribosome translating the leader peptide stalls and the antiterminator structure can form.

[1] At least 6 amino acid operons are known to be regulated by attenuation.

[1] This molecular or cell biology article is a stub.