Used in biochemical research to study enzyme inhibition, particularly in the context of arginine metabolism. Acts as an analog of L-ornithine, interfering with ornithine-dependent pathways. Commonly employed to investigate the activity of ornithine decarboxylase and other enzymes involved in polyamine synthesis. Its methylated structure enhances metabolic stability, making it useful in cellular and in vitro assays to modulate nitrogen metabolism and assess downstream effects on cell proliferation and signaling.