- Serum aspartate aminotransferase (AST; serum glutamate-oxalate transferase [SGOT]) and serum alanine aminotransferase (ALT; serum glutamate-pyruvate transferase [SGPT]) <=2.5 x upper limit of normal (ULN). If liver function abnormalities are due to underlying malignancy, then AST and ALT may be <=5x ULN