Figure 3.

Spectroscopic characterization of the dentinogenic hybrid peptide. (A) Characterization of SLd via mass spectroscopy shows expected [M + 3H]³⁺ and [M + 4H]⁴⁺ peaks at 1365 and 1024 Da, consistent with the molecular weight (4095 Da). (B) The FTIR spectrum demonstrates the characteristic β-sheet signature peak at 1625 cm^–1. (C) Circular dichroism spectrum contains a minimum at 217 nm, which is specific to a β-sheet secondary structure.