• 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

  • S4244

    SKLB 610

    VEGFR2, PDGFR, FGFR2 inhibitor.

    ≥98%
  • O1078

    Octreotide Acetate

    Somatostatin analog, peptide; somatostatin agon...

    ≥95%
  • P8382

    Puupehenone

    Sesquiterpene found in marine sponges.

    ≥94%
  • T1777

    S,S-(+)-Tetrandrine

    Benzylisoquinoline alkaloid originally found in...

    ≥98%
  • W0272

    S-(−)-Warfarin >99%ee

    Coumarin, more potent isomer; VKORC1 inhibitor....

    ≥99%
  • D3352

    Dinaciclib

    BRD binding agent, CDK1/2/5/9 inhibitor.

    ≥99%
  • A4854

    β-Amyloid Peptide (1-42), rat

    Endogenous APP peptide cleavage product, primar...

    ≥95%
  • T3035

    Thienylheptyl Isothiocyanate

    Thienylbutyl ITC analog.

    ≥95%
  • M1744

    Melittin

    Antimicrobial peptide found in Apis mellifera.<...

    ≥95%
  • A4521

    Alfacalcidol

    Vitamin D analog.

    ≥98%
  • C0020

    Cafestol

    Diterpene found in brewed, unfiltered coffee; F...

    ≥98%
  • S3368

    S1RA

    σ1 antagonist.

    ≥99%
  • F1655

    Fenoprofen Calcium Dihydrate

    NSAID; COX-1/2 inhibitor.

    ≥97%
  • I2118

    Ifenprodil Hemitartrate

    NMDA NR1/NR2B antagonist.

    ≥98%
  • A4000

    AK-1

    SIRT2 inhibitor.

    ≥99%
  • M568264

    Mogroside IIe

    Triterpenoid

    ≥98%
  • F4682

    Fluconazole

    Triazole; 14-α demethylase inhibitor.

    ≥98%
  • H5750

    Homoharringtonine

    Alkaloid found in Cephalotaxus; ribosomal prote...

    ≥97%
  • D0025

    DAMGO

    Synthetic peptice; μOR agonist.

    ≥95%
  • T0140

    TAK-632

    RAF inhibitor.

    ≥99%

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