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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
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Selenocysteine is derivative of which amino acid?
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The correct answer is  Selenocysteine is the 21st amino acid.its biosynthesis is by replacing oxygen from serine by selenium.cysteine is formed from serine (reversible). hence selenocysteine is formed from cysteineRef: DM Vasudevan - Textbook of Biochemistry, 7th edition, page no: 215