SHEET /m/cystine · PubChem CID 67678 · CAS 56-89-3 · REV 2026.07
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Cystine
from sourceC6H12N2O4S2 · 240.3 g/mol
L-dicysteine · Cysteine disulfide · Dicysteine · L-Cysteine disulfide
What is Cystine?
Two cysteines locked together by a sulfur bridge. It is what gives hair, nails, and hooves their toughness. from source
CategoryBody
LeaderboardsBiggest
Fig. 1 · 2D structure RDKit
SMILES
C([C@@H](C(=O)O)N)SSC[C@@H](C(=O)O)NWhere you'll find it
Your own body makes this one. It is not an ingredient you buy. See the rest of the body group.
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Where Cystine leads
Relatedcomputed
Serine52% similarBoth carry a carboxylic acid and an amine group.Cysteine50% similarBoth carry a carboxylic acid and an amine group.Aspartic acid50% similarBoth carry a carboxylic acid and an amine group.Selenocysteine50% similarBoth carry a carboxylic acid and an amine group.Asparagine48% similarBoth carry a carboxylic acid and an amine group.Methionine46% similarBoth carry a carboxylic acid and an amine group.