SHEET /m/selenocysteine · PubChem CID 25076 · CAS 10236-58-5 · REV 2026.07
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Selenocysteine
from sourceC3H7NO2Se · 168.06 g/mol
selenium cysteine · Sec
What is Selenocysteine?
The twenty-first amino acid, cysteine with selenium in place of sulfur. It sits at the business end of the enzymes that clean up oxidative damage. from source
CategoryBody
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Fig. 1 · 2D structure RDKit
SMILES
C([C@@H](C(=O)O)N)[SeH]Where you'll find it
Your own body makes this one. It is not an ingredient you buy. See the rest of the body group.
Toxicity & hazards
WarningIrritantH315, H319, H335from source
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Where Selenocysteine leads
Relatedcomputed
Serine55% similarBoth carry a carboxylic acid and an amine group.Cysteine52% similarBoth carry a carboxylic acid and an amine group.Aspartic acid52% similarBoth carry a carboxylic acid and an amine group.Asparagine50% similarBoth carry a carboxylic acid and an amine group.Cystine50% similarBoth carry a carboxylic acid and an amine group.Glutamic acid48% similarBoth carry a carboxylic acid and an amine group.