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Cat Number: PIPB-0099

Cysteine

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CAS Number

52-90-4

Synonyms

L-cysteine
cysteine
Cystein
Thioserine

Description

L-cysteine is an optically active form of cysteine having L-configuration. It has a role as a flour treatment agent, a human metabolite and an EC 4.3.1.3 (histidine ammonia-lyase) inhibitor. It is a serine family amino acid, a proteinogenic amino acid, a cysteine and a L-alpha-amino acid. It is a conjugate base of a L-cysteinium. It is a conjugate acid of a L-cysteinate(1-). It is an enantiomer of a D-cysteine. It is a tautomer of a L-cysteine zwitterion.

Molecular Weight

121.16

Molecular Formula

C3H7NO2S

EINECS

200-158-2

SMILES

C(C(C(=O)O)N)S

Appearance

Colorless or white solid

Melting Point

260 ℃ decomposes