Schematic representation of tenascin-C. Protein structure illustrating the N-terminal tenascin assembly domain, the epidermal growth factor (EGF)-like repeat region, the fibronectin type III-like region and the C-terminal fibrinogen-like domain. Exon organisation is shown below (adapted from ). Note that the first exon of TNC is not translated and is shown in grey; therefore, exon number 1 in this figure is the first coding exon. UTR, untranslated region.