L-NMMA (acetate) (Standard) is the analytical standard of L-NMMA (acetate). This product is intended for research and analytical applications. L-NMMA acetate is a nitric oxide synthase inhibitor of all NOS isoforms including NOS1, NOS2, and NOS3. The Ki values for nNOS (rat), eNOS (human), and iNOS (mouse) are approximately 0.18, 0.4, and 6 µM, respectively.