Skip to Content
Merck
All Photos(1)

Key Documents

View All Documentation

30199

Sigma-Aldrich

L-Cystine

BioUltra, ≥99.5% (T)

Synonym(s):

(R,R)-3,3′-Dithiobis(2-aminopropionicacid)

Sign Into View Organizational & Contract Pricing
All Photos(1)

About This Item

Linear Formula:
[-SCH2CH(NH2)CO2H]2
CAS Number:
56-89-3
Molecular Weight:
240.30
Beilstein:
1728094
EC Number:
200-296-3
MDL number:
MFCD00064228
UNSPSC Code:
12352200
eCl@ss:
32160406
PubChem Substance ID:
57648416

product line

BioUltra

Assay

≥99.5% (T)

form

powder or crystals

optical activity

[α]20/D −219±5°, c = 1% in 1 M HCl

impurities

insoluble matter, passes filter test
≤0.3% foreign amino acids

ign. residue

≤0.05% (as SO4)

loss

≤0.05% loss on drying, 20 °C (HV)

color

white

mp

>240 °C (dec.) (lit.)

solubility

1 M HCl: 0.2 M at 20 °C, clear, colorless

anion traces

chloride (Cl-): ≤500 mg/kg
sulfate (SO42-): ≤100 mg/kg

cation traces

Al: ≤5 mg/kg
As: ≤0.1 mg/kg
Ba: ≤5 mg/kg
Bi: ≤5 mg/kg
Ca: ≤10 mg/kg
Cd: ≤5 mg/kg
Co: ≤5 mg/kg
Cr: ≤5 mg/kg
Cu: ≤5 mg/kg
Fe: ≤10 mg/kg
K: ≤50 mg/kg
Li: ≤5 mg/kg
Mg: ≤5 mg/kg
Mn: ≤5 mg/kg
Mo: ≤5 mg/kg
Na: ≤50 mg/kg
Ni: ≤5 mg/kg
Pb: ≤5 mg/kg
Sr: ≤5 mg/kg
Zn: ≤5 mg/kg

absorption

cut-off at 316 nm in 1 M HCl at 0.2 M

SMILES string

N[C@@H](CSSC[C@H](N)C(O)=O)C(O)=O

InChI

1S/C6H12N2O4S2/c7-3(5(9)10)1-13-14-2-4(8)6(11)12/h3-4H,1-2,7-8H2,(H,9,10)(H,11,12)/t3-,4-/m0/s1

InChI key

LEVWYRKDKASIDU-IMJSIDKUSA-N

Looking for similar products? Visit Product Comparison Guide

Other Notes

Certain malignant cell lines require cystine or cysteine in the culture medium; Growth requirement of various microorganisms

Storage Class Code

11 - Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library

CRC Handbook of Microbiology, 4, 1-1 (1974)
J R Uren et al.
Cancer treatment reports, 63(6), 1073-1079 (1979-06-01)
The L-cyst(e)ine requirements of normal and malignant cells are reviewed and expanded within the context of establishing whether the measurement of gamma-cystathionase levels constitutes a predictive test for tumor sensitivity to L-cyst(e)ine depletion. The ability of both purified L-cysteine desulfhydrase
Anne C Conibear et al.
The Journal of biological chemistry, 288(15), 10830-10840 (2013-02-23)
θ-Defensins are ribosomally synthesized cyclic peptides found in the leukocytes of some primate species and have promising applications as antimicrobial agents and scaffolds for peptide drugs. The cyclic cystine ladder motif, comprising a cyclic peptide backbone and three parallel disulfide
Maisie Lo et al.
Journal of cellular physiology, 215(3), 593-602 (2008-01-09)
The x(c) (-) cystine/glutamate antiporter is a major plasma membrane transporter for the cellular uptake of cystine in exchange for intracellular glutamate. Its main functions in the body are mediation of cellular cystine uptake for synthesis of glutathione essential for
Jan Lewerenz et al.
Antioxidants & redox signaling, 18(5), 522-555 (2012-06-07)
The antiporter system x(c)(-) imports the amino acid cystine, the oxidized form of cysteine, into cells with a 1:1 counter-transport of glutamate. It is composed of a light chain, xCT, and a heavy chain, 4F2 heavy chain (4F2hc), and, thus
View All Related Papers

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service