Atlas One · Host Biology · Scale 02 — Atomic

Selenium

Selenium (Se, atomic number 34) — 13–20 mg total; selenocysteine in ~25 selenoproteins: GPx (antioxidant), thioredoxin reductase (redox homeostasis), and deiodinases (T4→T3). Deficiency causes Keshan cardiomyopathy, hypothyroidism, and impaired immune function.

Also known as: Se, selenocysteine, Sec, selenoprotein, selenium-78

Scale 02 — AtomicScale
draftStatus
2026-06-05Last Reviewed
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selenium

Selenium

Selenium (Se, atomic number 34) — 13–20 mg total; selenocysteine in ~25 selenoproteins: GPx (antioxidant), thioredoxin reductase (redox homeostasis), and deiodinases (T4→T3). Deficiency causes Keshan cardiomyopathy, hypothyroidism, and impaired immune function.