 - Alkaline phosphatase and AST may not both be greater than the ULN. For example, if the alkaline phosphatase is greater than the ULN but less than or equal 2.5 x ULN, then the AST must be less than or equal the ULN. If the AST is greater than the ULN but less than or equal 1.5 x ULN, then the alkaline phosphatase must be less than or equal ULN. 