• 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

  • A0962

    Adrenocorticotropic Hormone (1-4)

    Endogenous peptide hormone fragment, involved i...

    ≥95%
  • P7628

    Parathyroid Hormone-Related Protein (1-34), human/rat

    Endogenous peptide hormone, increases extracell...

    ≥95%
  • P7021

    Prednisone Acetate

    Synthetic prednisolone prodrug; glucocorticoid ...

    ≥98%
  • P4560

    Proteolipid Protein (139-151)

    Immunodominant peptide fragment of PLP, used to...

    ≥95%
  • L3326

    Ligustrazine Hydrochloride

    Dihydropyrazine found in Ligusticum walliichi. ...

    ≥98%
  • T3461

    Tiplaxtinin

    PAI-1 inhibitor.

    ≥98%
  • C5600

    CO-1686

    EGFR (WT, T790M) inhibitor.

    ≥98%
  • H9620

    7-Hydroxyaristolochic Acid A

    Derivative of aristolochic acid found in Asarum...

    ≥95%
  • A2048

    Aflatoxin G1

    Mycotoxin produced by species of Aspergillus; D...

    ≥98%
  • C2956

    Cholecalciferol

    Endogenous vitamin D prodrug.

    ≥98%
  • C2970

    Chrysophanol

    Anthraquinone found in Rheum.

    ≥98%
  • L0249

    Laminin Peptide YIGSR-NH2

    Laminin-derived peptapeptide.

    ≥98%
  • G733400

    GSK-2578215A

    Selective inhibitor of LRRK2.

    ≥98%
  • A4002

    AK-7

    SIRT2 inhibitor.

    ≥98%
  • L0284

    Lavendustin A

    Tyrosine kinase inhibitor.

    ≥97%
  • S0168

    Saracatinib

    Src and Abl inhibitor.

    ≥98%
  • S8345

    S-(−)-Sulpiride

    GHB agonist, D2/3 antagonist.

    ≥99%
  • M1745

    Melatonin

    Endogenous hormone involved in circadian rhythm...

    ≥98%
  • N3210

    Nicergoline

    Ergot derivative found in Claviceps; α1-adrene...

    ≥98%
  • D1722

    Defactinib

    FAK inhibitor.

    ≥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