threonine

Repeats of the amino acids threonine and glycine in a transcription-factor protein modulate the temperature responsiveness of the circadian clock in the fruit fly Drosophila melanogaster11.

Because of that tiny code change, my bacteria cells will make the amino acid lysine instead of another one, threonine.

Briefly, we computationally searched for peptide sequences containing proline followed by a random amino acid and a serine or threonine.

There is indeed one required mutation in the PfCRT protein, which is a change of an amino acid lysine to threonine.

For example an ACG in the gene, means 'use the amino acid threonine next'.