Biochemistry A patient with increased Hypoxanthine and Xanthine in blood with hypouricemia which enzyme is deficient? A HGPase B Xanthine oxidase C Adenosine deaminase D APRtase 💡 Explanation A patient with increased Hypoxanthine and Xanthine in blood with hypouricemia which enzyme is deficient? ✓ Correct Answer: B. Xanthine oxidase