What about other liver enzymes?

Aside from AST and ALT, there are other enzymes including alkaline phosphatase, 5'-nucleotidase ("5 prime" nucleotidase), and gamma-glutamyltranspeptidase (GGT) that are often tested for liver disease.

We have restricted this consideration of liver enzymes to AST and ALT because they are biochemically related to each other and, more importantly, they are the two most useful liver enzymes.