. Calcified tissues; proceedings. Bone; Collagen; Calcification. 114 F. G. E. Pautard geneous fibrous protein which is the bulk of the organic substance oriented with bone salts, but in the calcified keratins, which are also fibrous and also oriented, the horny material of the "matrix" is not one protein, but a family of proteins, each of which. Fig. 2. Comparison of X-ray Laue diffraction diagrams (CuK radiation, fibre axis vertical) from two pairs of structures of epidermal origin, a. Fringe fibre tip of baleen from BaLtenoptcriis horealis. h. Tips of anterior dorsal papillae from
. Calcified tissues; proceedings. Bone; Collagen; Calcification. 114 F. G. E. Pautard geneous fibrous protein which is the bulk of the organic substance oriented with bone salts, but in the calcified keratins, which are also fibrous and also oriented, the horny material of the "matrix" is not one protein, but a family of proteins, each of which. Fig. 2. Comparison of X-ray Laue diffraction diagrams (CuK radiation, fibre axis vertical) from two pairs of structures of epidermal origin, a. Fringe fibre tip of baleen from BaLtenoptcriis horealis. h. Tips of anterior dorsal papillae from bovine tongue, c. Tip of chela of Squilla species, d. Tip of chela of Callinectes is comparable to collagen in a mechanical sense. Again, in the calcified chitins (for instance Kelly et al., 1965) the principal oriented organic component is the poly- saccharide, but protein In some unknown configuration is present also and in this case the "matrix" consists of a complex partnership in which the protein tends to diminish as calcification Increases. The diversity of organic molecules and macromolecules associated with calcium salts prompts me to suggest the term topographical matrix to describe the skeletal, usually fibrous, framework laid down In partnership with the mineral phase. This term conveys the idea of an architectural arrangement of stable, frequently Insoluble structures which are often oriented with the Inorganic crystals and which can be distinguished from the more labile and sparse "ground substances" which fill the Interstices of the fibrous network. The topographical matrix is related to the calcium deposits in some way, but we are not committed to thinking of one macromolecule. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original European Symposium on Calcified Tissues; Europea
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