Plasma fibronectin, which is synthesized by hepatocytes, and fibronectin synthesized by cultured fibroblasts are similar but not identical; immunological, structural, and functional differences have been reported.
A fibronectina do plasma, sintetizada polos hepatocitos, e a fibronectina sintetizada polos fibroblastos de cultivos celulares, son similares pero non idénticas; presentan diferenzas inmunolóxicas, estruturais, e funcionais.