Reversibly blocks the cell cycle at G1-phase (effective concentrations 100 - 300 mM). Inhibits the hydroxylation of deoxyhypusine and thus inhibits eukaryote initiation factor 5-A (eIF5-A). Arrests DNA synthesis by inhibiting deoxyribonucleotide metabolism. Also chelates iron via the kojic acid metal-binding domain. L-Mimosine is used as a hypoxia-mimetic agent to stabilize Hypoxia Inducible Factor 1 (HIF-1). L-Mimosine stabilizes HIF-1 through the inhibition of Prolyl Hydroxylases (PHDs) which target HIF-1 through degradation. The mechanism of inhibition is likely through the chelation of Fe2+ bound to the active site of PHD which is required for enzymatic activity.