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Characterization of intracellular reduced selenium species. HPLC-ICP-MS chromatograms of selenium species standards containing l-selenocystine (Se-Cys)2, Se-methylseleno-l-cysteine (SeMC), and d,l-selenomethionine (Se-Met) (a) and selenoamino acids isolated from the seleniumized cells (b) and the control cells untreated with Na2SeO3 (c).
