The ARG1 Inhibitor Screening Assay Kit is designed to measure ARG1 enzyme inhibition. The kit comes in a convenient format, with enough reaction solution and enzyme to perform a total of 100 reactions. The ARG1 Inhibitor Screening Assay Kit is simple to use. Inhibitor and enzyme are added to a sample containing thioarginine substrate. After a room temperature incubation, activity is determined by measuring the absorption of reaction product at λ=410-415 nm.