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F0162 Sigma-Aldrich

Fibronectin Proteolytic Fragment from human plasma

lyophilized powder, 45 kDa

Synonym: Fibronectin



Related Categories Application Index, Attachments Factors, Biochemicals and Reagents, Cell Biology, Cell Signaling Enzymes,
biological source   human plasma
assay   ≥90% (SDS-PAGE)
form   lyophilized powder
packaging   pkg of 0.5 mg
impurities   HIV and HBsAg, source material tested negative
  Small proteolytic fragments, may contain traces
solubility   water: soluble ≥0.500 mg/mL, clear to slightly hazy, colorless
storage temp.   −20°C
Gene Information   human ... FN1(2335)



The product should be stored at -20°C.


0.5 mg in glass bottle

Preparation Note

This product is lyophilized from phosphate buffered saline with sucrose as a cryoprotectant. The source material has tested negative for antibody to HIV, HCN, and HBsAg. It is soluble in water at 0.5 mg/mL and yields a clear to slightly hazy solution.


Fibronectin proteolytic fragment from human plasma has been used as fluorophore-conjugated proteins. It has also been used in solid phase binding assay.

Biochem/physiol Actions

Fibronectin participates in cell adhesion, growth, migration, wound healing, blood coagulation and metastasis. Mutations in FN1 results in glomerulopathy. It plays an important role in cell attachment and spreading, control of cell cytoskeleton, morphology and differentiation. FN1 is also involved in extracellular matrix formation, hemostasis and thrombosis. Proteolytic fragments of fibronectin plays a vital role in mononuclear phagocyte function.

Fibronectins are high molecular weight glycoproteins with two subunits joined by a disulfide bond to form the dimer. The fragments are obtained using protelytic enzymes. This 45 kDa gelatin binding fragment is obtained through trypitc digestion of the N-terminal 70 kDa fragment, which is produced by Cathespin D digestion.

This fragment has an acidic pI (4.9-5.3) and does not bind to heparin. This domain is resistant to proteolysis due to intrachain disulfide bonding and the attached carbohydrate. The intrachain disulfide bonds are essential for binding to gelatin, while the complex, branched, asparagine-linked carbohydrate is not. This fragment binds to C1q, but not to fibrin.

General description

Fibronectin 1 is a glycoprotein of the extracellular matrix that is coded by FN1 gene. It is expressed in the plasma and at the cell surface.FN1 is mapped to human chromosome 2q35. Proteolytic fragments of fibronectin has a cell binding domain. Plasma fibronectin has two polypeptide chains connected by two disulphide bonds present near carboxy terminal. Each polypeptide chain is of 220-250 kDa.

Safety & Documentation

Safety Information

GHS07  GHS07
Signal word 
Hazard statements 
Precautionary statements 
NONH for all modes of transport
WGK Germany 

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Milli-Q® Water Purification Solutions
Protocols & Articles


Extracellular Matrix Proteins and tools for cell culture optimization

Animal cells and tissue culture techniques are constantly improved to optimize in vitro cell culture conditions. Extracellular Matrix (ECM) proteins coating, chemical or physical modification of the ...
Keywords: Adhesion, Angiogenesis, Apoptosis, Asymmetric synthesis, Cancer, Cell attachment, Cell culture, Cell proliferation, Coagulation, Endocrinology, Growth factors, Hormones

Fibronectin Cell Attachment Protocol

Freezing and thawing of reconstituted fibronectin is not recommended as breakdown of protein will occur.
George Sitterley
BioFiles 2008, 3.8, 9.
Keywords: Phase transitions

What is the Extracellular Matrix?

The extracellular matrix (ECM) is secreted by cells and surrounds them in tissues. It has long been understood to be the structural support for cells since its characteristics set the characteristics...
Keywords: Adhesion, Cell culture, Cellular processes, Epimerizations, Growth factors, Immobilization, Sulfations

Peer-Reviewed Papers


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