This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Unknown
Conversion of Norepinephrine to Epinephrine - 
Select and explain. 
A. COMT, B. MAO, C. PENMT, D. SAM
C: PENMT
Answer: C: PENMT 
Explanation: Ans. (c) PENMT Ref: Harper's Biochemistry 30th edn. /509-510 *Phenylethanolamine N-methyltransferase (PENMT) is an enzyme found in the adrenal medulla that converts Norepinephrine (Noradrenaline) to Epinephrine (Adrenaline) cortex. *S. Adenosyl -L- Methionine (SAM) is a required cofactor.