For evaluation and high-throughput screen (HTS) of nitric oxide synthase (NOS) modulators. Key Features: High-throughput. Homogenous “ mix-incubate-measure” type assay. Can be readily automated on HTS liquid handling system. Rapid and reliable. Can be completed in less than 3 hours if assay performed at 37° C. Method: OD540nm. Samples: Nitric Oxide Synthase. Species: All. Procedure: Assay takes 2-3 hours. Kit size: 100 tests.