• 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

  • M0114

    Madecassic Acid

    Downregulates LPS-stimulated expression of pro-...

    ≥95%
  • L1983

    Leucomyosuppressin

    Peptide found in insects.

    ≥95%
  • B8277

    Butein

    Flavonoid found in Rhus verniciflua and Butea m...

    ≥99%
  • D0263

    Dapoxetine Hydrochloride

    SERT inhibitor, potential voltage-gated K+ chan...

    ≥99%
  • D3374

    Disulfiram

    Aldehyde dehydrogenase, 26S proteasome, MGMT in...

    ≥98%
  • M0248

    Manidipine Dihydrochloride

    Dihydropyridine; L-type and T-type Ca2+ channel...

    ≥99%
  • C6019

    C-Peptide, human

    Endogenous peptide, connects A and B chains of ...

    ≥95%
  • H966144

    6-Hydroxydopamine Hydrobromide

    Neurotoxin frequently used to aid in modeling P...

    ≥98%
  • S5753

    Somatostatin-28 (1-14)

    Endogenous neuropeptide hormone; somatostatin a...

    ≥95%
  • H9715

    Hydroxyurea

    Fetal hemoglobin stimulator; ribonucleotide red...

    ≥98%
  • T564098

    Tocored

    Tocopherol analog

  • P7060

    Protocatechuic Acid Ethyl Ester

    Dihydroxyphenolic acid found in cruciferous veg...

    ≥98%
  • T5869

    Torcetrapib

    Cholesterol ester transfer protein inhibitor.

    ≥98%
  • A6132

    Apicidin

    Cyclic tetrapeptide; HDAC inhibitor.

    ≥98%
  • S1606

    Secretin, porcine

    Endogenous peptide hormone, involved in water h...

    ≥95%
  • A5030

    4-Aminophenylphosphate Monosodium

    Alkaline phosphatase substrate used to quantify...

    ≥97%
  • M324083

    Micafungin

    Echinocandin

    ≥95%
  • V0045

    Valacyclovir Hydrochloride

    Neuraminidase inhibitor.

    ≥98%
  • N3496

    Nizatidine

    Histamine H2 inverse agonist.

    ≥98%
  • R2514

    RGDV

    Tretraeptide, binds cell surface integrins.

    ≥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