• Skip to primary navigation
  • Skip to main content
  • Skip to footer

LKT Labs

Biochemicals for Life Science Research

  • Products
    • New Products
    • Cancer Biology
    • Cardiovascular
    • Endocrine Signaling and Immunology
    • Metabolic and GI Pathology
    • Microbiology
    • Natural Products
    • Neuroscience
    • Peptides
    • Pharmaceutical Impurities and Derivatives
    • Stem Cell Modulators
  • Services
    • Custom Synthesis
    • Natural Product Isolation
    • Analytical Services
  • Int’l Distributors
  • Support
    • About LKT Labs
    • General Inquiry
    • Bulk Quote Request
    • Document Request
    • Technical Support
    • Catalog Request
    • Product Flyers
  • Contact Us
  • Cart
  • Login / Register
L-Cystine

L-Cystine

Product ID C9773
Cas No. 56-89-3
Purity ≥98%
Product Unit SizeCostQuantityStock
25 g $48.00 In stock
100 g $126.00 In stock
500 g $331.00 In stock
Bulk Quote

Quicklinks

  • Description
  • Product Info
  • Shipping and Storage
  • Downloads
  • References
  • Description
  • Product Info
  • Shipping and Storage
  • Downloads
  • References
  • Custom Order

Description

L-Cystine is an endogenous amino acid and substrate for various endogenous enzymes. L-Cystine forms dimers and plays a significant role in protein folding due to its ability to form disulfide bridges.

Product Info

Cas No.

56-89-3

Purity

≥98%

Formula

C6H12N2O4S2

Formula Wt.

240.30

Chemical Name

L-Cystine

IUPAC Name

(2R)-2-amino-3-[[(2R)-2-amino-2-carboxyethyl]disulfanyl]propanoic acid

Synonym

[R-(R*,R*)]-3,3'-dithiobis[2-aminopropanoic acid], Cystine, Dicysteine, Gelucystine

Melting Point

260-261°C

Solubility

Soluble in aqueous solutions of pH < 2 or pH > 8.

Appearance

Colorless or White Crystals

Shipping and Storage

Store Temp

Ambient

Ship Temp

Ambient

Downloads

MSDS

C9773 MSDS PDF

Info Sheet

C9773 Info Sheet PDF

References

Kolmar H. Biological diversity and therapeutic potential of natural and engineered cystine knot miniproteins. Curr Opin Pharmacol. 2009 Oct;9(5):608-14. PMID: 19523876.

Dröge W, Holm E. Role of cysteine and glutathione in HIV infection and other diseases associated with muscle wasting and immunological dysfunction. FASEB J. 1997 Nov;11(13):1077-89. PMID: 9367343.

Custom Order

  • Size of single unit expressed as number (e.g. '500' in the case of 500 mg)
  • Total quantity of unit size desired (e.g. '10' in the case of 10 x 500 mg). If only one unit is desired, you may leave this blank.
  • This field is for validation purposes and should be left unchanged.

Related Products

  • V0252

    Vancomycin Hydrochloride

    Glycopeptide, binds D-Ala-D-Ala; cell wall synt...

    ≥1050 IU/mg, bio assay
  • G4580

    Glucosamine Hydrochloride

    Endogenous amino sugar precursor required for p...

    ≥96%
  • S8005

    Substance P

    Endogenous tachykinin peptide, involved in infl...

    ≥95%
  • A0822

    N-Acetyl-S-(N-methylsulfinylbutylthiocarbamoyl)-L-cysteine

    Sulforaphane-cysteine conjugate.

    ≥98%
  • S336507

    Simufilam Dihydrochloride

    Unlikely to reverse Alzheimer’s

    ≥98%
  • K9600

    KY-02111

    Wnt signaling inhibitor.

    ≥98%
  • D5607

    Dobutamine Hydrochloride

    β1-adrenergic agonist, β2- and α1-adrenergic...

    ≥98%
  • G1646

    Geldanamycin

    HSP90 inhibitor.

    ≥97%
  • B030966

    BAY 11-7082

    inhibits inflammatory signaling

    ≥98%
  • H9862

    Hypothemycin

    Polyketide found in Setophoma.

    ≥96%
  • B5870

    Borrelidin

    Macrolide; threonyl-tRNA synthetase/ligase inhi...

    ≥99%
  • G5874

    Gossypol

    Polyphenol found in Gossypium; calcineurin and ...

    ≥98%
  • C7992

    CTX-0294885

    Bisaniline pyrimidine; pan-kinase inhibitor.

    ≥98%
  • F4532

    Flibanserin

    5-HT1A agonist, 5-HT2A antagonist.

    ≥97%
  • Q8133

    Quinacrine Dihydrochloride Dihydrate

    Cell membrane permeability modulator, topoisome...

    ≥97%
  • A0819

    Acetylsalicylic Acid

    NSAID; COX-1/2 inhibitor.

    ≥98%
  • E7433

    Etidronate Disodium

    Bisphosphonate, chelating agent.

    ≥98%
  • C2969

    Chromomycin A3

    Anthraquinone, Mg2+/Zn2+ chelator; bacterial DN...

    ≥97%
  • R2512

    RGD

    Tripeptide, binds cell surface integrins.

    ≥95%
  • H9861

    Hypericin

    Naphthodianthrone found in Hypericum; dopamine ...

    ≥98%

Footer

  • Contact Us
  • About Us
  • Site Map
  • Terms and Conditions
LKT Laboratories, Inc.
545 Phalen Blvd.
St. Paul MN, 55130

Ph: (888)-558-5227
Fax: (888)-558-7329

©2026 LKT Laboratories, All Rights Reserved - Products for research use only