Figure 1.

a) Circular dichroism spectra of OPN peptides in water solution (blue), with addition of Ca²⁺ cations (red) and subsequently C₂O₄ ²⁻ anions for CaC₂O₄ mineralization (green). b) Secondary structure estimation of the respective OPN peptides in water solution (blue), with addition of Ca²⁺ cations (red), and subsequently C₂O₄ ²⁻ anions (green).