Their combined levels could distinguish biliary-associated AP from alcohol-associated AP, as shown in Figure 1B. The median levels of liver function markers, such as total bilirubin, conjugated bilirubin, alanine transaminase (ALT), aspartate transaminase (AST), and ALP, were elevated beyond the normal physiological range in patients with SAP. Here, GPT is linked to alkaline phosphatase measurement.