• 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 $48.10 In stock
100 g $126.20 In stock
500 g $330.50 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

  • K7602

    KT5823

    PKG inhibitor.

    ≥98%
  • F0150

    Famotidine

    Histamine H2 antagonist, GSK-3β inhibitor.

    ≥98%
  • SB5778

    Snake venom – Bothrops neuwiedi diporous

    Snake venom found in Bothrops neuwiedi diporus;...

    ≥98%
  • R2788

    RGW-611

    Morpholine derivative.

    ≥98%
  • V3277

    Vitamin E

    Synthetic vitamin E, antioxidant.

    ≥98%
  • T2936

    Thioridazine Hydrochloride

    Piperadine phenothiazine; FIASMA, D1-5, histami...

    ≥98%
  • C4657

    Clotrimazole

    Imidazole; 14-α demethylase, H+/K+ ATPase, Na+...

    ≥97%
  • B4518

    Bleomycin Sulfate

    Mixture of glycopeptide bleomycin sulfate salts...

    ≥90%
  • N8561

    NVP-AEW541

    IGF-1R inhibitor.

    ≥98%
  • P2997

    Phytic Acid, 40-50 wt% aqueous solution

    Saturated cyclic acid used to store phosphorus ...

    ≥40%
  • D0032

    Daidzein

    Phytoestrogen, isoflavone found in various plan...

    ≥97%
  • E6234

    Epigallocatechin Gallate

    Flavanol found in Camilla (green tea); AhR ant...

    ≥98%
  • R3475

    Risperidone

    Benzisoxazole; 5-HT7 and NMDA agonist, D-amino ...

    ≥98%
  • B3203

    Biapenem

    β-lactam; penicillin binding protein inhibitor...

    ≥98%
  • U6854

    Urocortin, human

    Endogenous peptide hormone, involved in feeding...

    ≥98%
  • I5753

    Ionomycin Calcium

    Polyether Ca2+ ionophore.

    ≥98%
  • A7672

    Atropine Sulfate Monohydrate

    Tropane alkaloid found in Solanaceae plants; mA...

    ≥98%
  • B6856

    5-Bromo-2′-Deoxyuridine

    Nucleoside (thymidine) analog.

    ≥98%
  • A6800

    AR-A014418

    GSK-3β inhibitor.

    ≥98%
  • A6002

    Apamin

    Peptide, bee venom toxin; SK2/3/4 K+ channel bl...

    ≥95%

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

©2025 LKT Laboratories, All Rights Reserved - Products for research use only