Medicine Which of the following enzymes is believed to be deficient in Parkinsonism? A DOPA Decarboxylase B Tyrosine Hydroxylase C Phenylalanine Hydroxylase D Dopamine oxidase 💡 Explanation Which of the following enzymes is believed to be deficient in Parkinsonism? ✓ Correct Answer: B. Tyrosine Hydroxylase