assay kit EnzyChrom Aspartate Transaminase Assay Kit (BioAssay Systems) PubChem AID: 743184 Date from BAE: 9/30/2016 https://www.bioassaysys.com/Aspartate-Transaminase-Assay-Kit.html An absorbance-based assay system for measuring aspartate transaminase (known as serum glutamic oxaloacetic transaminase (GOT) or aspartate aminotransferase (ASAT/AAT)), based on the quantification of oxaloacetate produced by AST. In this assay, oxaloacetate and NADH are converted to malate and NAD by the enzyme malate dehydrogenase. The decrease in NADH absorbance at 340 nm is proportionate to AST activity.