Abstract
In an attempt to develop collagen-growth factor composites for use in tissue engineering, chimeric proteins consisting of epidermal growth factor and collagen binding domains derived from von Willebrand factor or fibronectin were synthesized by means of recombinant technology. These chimeric proteins were bound to type I collagen fibrils, and the ultrastructures of composites were analyzed by transmission electron microscopy combined with the gold nanoparticle labeling technique. The results of the ultrastructural study revealed that chimeric proteins were densely assembled on collagen fibrils through the specific recognition of binding sites, producing the ordered array of chimeric proteins.
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