Fibronectin, Bovine

Fibronectin is an extracellular matrix (ECM) component and is one of the primary cell adhesion molecules.1 It is composed of multiple homologous repeats and contains many functional domains. The occurrence of different isoforms is due to alternative mRNA splicing of the ED-A, ED-B and III-CS regions and subsequent post-translational modification. Although non-reactive with adhesion receptors in its soluble state, fibronectin is highly adhesive when on the surface.2 Polymerization of fibronectin into ECM must be tightly regulated to ensure appropriate adhesive proporties upon ECM formation. Because of its ability to interact with many ligands (e.g. cells, heparin, fibrin, collagen, DNA, immunoglobulin), fibronectin plays an important role in normal morphogenesis, including cell adhesion, migration, differentiation, and specific gene expression.||Activity: |Measured by its ability to support cell attachment and spreading when used as a substratum for cell culture.||Molecular Weight: |220kD (reduced)||Applications: |Suitable for use in ELISA, Ouchterlony, Western Blot. Used in vitro differentiation of mouse ES cells into neural cells. Suitable for use in mouse embryonic stem cell research. Use in Basal Medium A and as a coating agent for coverslips. This component is recommended for growth and survival of neural cell types during in vitro differentiation of mouse ES cells.||Usage:|To coat coverslips, prepare a 1mg/ml solution. For use as a substratum for cell attachment and spreading, use at 1-5ug/cm2. To support cell spreading, add 0.5-50ug/ml in media.||Storage and Stability:|May be stored at 4°C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20°C. Aliquots are stable for 6 months after receipt at -20°C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.