This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of protein and amino acid, Subject name: Biochemistry
Glucuronyl conjugation of which amino acid leads to maximum excretion through urine? 
Select and explain. 
A. Glycine, B. Alanine, C. Proline, D. Serine
B: Alanine
Answer: B: Alanine 
Explanation: Non-essential amino acid alanine performs 2 imp functions. Incorporation into proteins &transamination and NH3transpo. After glucuronide conjugation, it is excreted through urineRef: Biochemistry, U. Satyanarayana, Fouh edition, page no: 371