Which enzyme is NOT listed among the nine enzymes with macroforms?

• A. Lactate dehydrogenase
• B. Amylase
• C. Lipase
• D. Uricase

Answer: (D)

Macroforms of enzymes arise when enzymes in serum form high-molecular-weight complexes, often with immunoglobulins or other proteins, which can cause a persistent, higher measured activity despite little or no ongoing tissue damage. In clinical practice, several enzymes are well known to occur as these macroforms, such as amylase (macroamylase), lipase, lactate dehydrogenase, creatine kinase, and certain others like alkaline phosphatase and transaminases. Uricase, however, is not a routine human serum enzyme and does not typically form a macroenzyme detectable in standard testing, so it isn’t included among the enzymes listed as having macroforms.