Amino Acids: Difference between revisions
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==L- and D-Amino Acids== | ==L- and D-Amino Acids== | ||
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PDB Nomenclature | PDB Nomenclature | ||
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===Selenocysteine: the 21st amino acid=== | ===Selenocysteine: the 21st amino acid=== | ||
Rare proteins in all domains of life include '''[[Selenocysteine|selenocysteine (Sec, U)]]''', designated the 21st amino acid<ref name='21st'>PMID: 11028985</ref>. | Rare proteins in all domains of life include '''[[Selenocysteine|selenocysteine (Sec, U)]]''', designated the 21st amino acid<ref name='21st'>PMID: 11028985</ref>. In 2024, over 90 entries in the [[PDB]] include selenocysteine, identified as SEC. | ||
===Pyrrolysine: the 22nd amino acid=== | ===Pyrrolysine: the 22nd amino acid=== | ||