Boc Sciences is the world's leading provider for special chemicals. Abbreviated as Sec or U, in older publications also as Se-Cys, as a building block of selenoproteins, this 21st proteinogenic amino acid exists naturally in three domains of life, but not in every lineage.Used for the characterization of total sodium concentration in human blood plasma; Also used for the preparation of nitrite-selective membrane electrode, used for the potentiometric determination of NAD(P)H coenzymes.
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