An electron-microscope investigation into the distribution of polyphenols in the periostracum and cells of the inner face of the outer fold of Mytilus edulis

Polyphenols were located in all the layers of the periostracum and in inclusion bodies in the inner face of the outer-fold cells of Mytilus edulis L. Results, after 4 days periostracum repair, show that the proto-ostracal material is deposited in distinct layers. Inclusion bodies in the cells of the inner face of the outer fold appear to give rise to the polyphenols in the proto-ostracal material.