SHEET /m/homocysteine · PubChem CID 778 · CAS 454-29-5 · REV 2026.07
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Homocysteine
from sourceC4H9NO2S · 135.19 g/mol
Hcy · homo-Cys
What is Homocysteine?
An amino acid that builds up when the body is short of B12, B6, or folate. Its blood level is used as a marker of that shortage. from source
CategoryBody
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Fig. 1 · 2D structure RDKit
SMILES
C(CS)C(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 Homocysteine leads
Relatedcomputed
Cysteine62% similarBoth carry a carboxylic acid, an amine and a thiol group.Glutamic acid57% similarBoth carry a carboxylic acid and an amine group.Glutamine54% similarBoth carry a carboxylic acid and an amine group.Ornithine54% similarBoth carry a carboxylic acid and an amine group.Lysine52% similarBoth carry a carboxylic acid and an amine group.Methionine50% similarBoth carry a carboxylic acid and an amine group.