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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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Cysteine is formed from -
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The correct answer is  Ans. is 'a' i.e., Methionine and Serine o Cysteine, while not nutritionally essential, is formed from methionine, which is nutritionally essential. Following conversion of methionine to homocysteine , homocysteine and serine form cystathionine, whose hydrolysis forms cysteine and homoserine .o The sulfur of cysteine derives from methionine and the carbon skeleton from serine.