Essential Biochemistry - Protein Metabolism (Section 5 - No. 50)
What compound is formed in the first step of the conversion of methionine to cysteine?
Cystathionine
Homocysteine
Cysteine
Methionine sulfoxide
Explanation
Homocysteine is the intermediate formed after the transfer of a methyl group from SAM to cysteine, in the pathway for the conversion of methionine to cysteine.
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