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Background:  A new reference material for the liver enzyme aspartate transaminase (AST) (L-aspartate: 2-oxoglutarate-aminotransferase, EC 2.6.1.1), also called aspartate aminotransferase (ASAT), has been developed under the code ERM-AD457/IFCC. This certified reference material (CRM) for AST has been produced from a human type recombinant AST expressed in  Escherichia coli  and a buffer containing bovine serum albumin, and has been lyophilised.

Traceability of values for catalytic activity concentration of enzymes: a Certified Reference Material for aspartate transaminase