Gelatinous Siphon Sheath Templates the Starfruit-Shaped Aragonite Aggregate Growth

Figure 1

FTIR spectra of (a) the siphon sheath inner layers, (b) crystals grown on coverslips, and (c) crystals grown on siphon sheaths. (a) Peaks corresponding to chitin and protein are shown in (a). Characteristic peaks of calcite and aragonite are shown in (b) and (c), respectively.