Selenocysteine (Sec) is a rare amino acid that is encoded by the UGA codon. Selenocysteine biosynthesis occurs in two steps: the first step converts methionine to Selen methionine, and the second step adds selenium to form selenocysteine.
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Selenocysteine (Sec) is a rare amino acid that is encoded by the UGA codon. Selenocysteine biosynthesis occurs in two steps: the first step converts methionine to Selen methionine, and the second step adds selenium to form selenocysteine.