DNA-binding protein involved in the repression of transcription of a large number of genes, thereby arresting growth, in response to environmental changes. In the famine mode, FL11 forms dimers and acts as a repressor, leading to growth arrest. In the feast mode, in the presence of high concentrations of lysine or arginine, four dimers assemble into an octamer and cover the fl11 and lysine biosynthesis promoters. This leads to the inhibition of fl11 expression and lysine biosynthesis, decrease of the FL11 concentration in the cell, derepression of the target genes and activation of the metabolism. Homodimer. Binds DNA as a dimer and an octamer.