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Files in this Data Supplement:
Fig. S1 XPS analysis of Nereis jaw powder. Shown are partial XPS spectra of Tris and Tris/EDTA treated jaw powders. EDTA treatment results in a significant reduction in Zn signal.
Fig. S2 Characterization of samples for SIMS analysis. (A) SEM image of a Nereis jaw. Longitudinal samples were prepared by trimming to the plane indicated (red disc). (B) Br and Zn EDS maps before and after incubation in Tris/EDTA (left) and Tris (right). Br distribution is unchanged during treatment. Zn loss occurs primarily in a Br-poor zone corresponding to the jaw core. Regions selected for analysis are indicated by white outlines. Scale bar, 1mm.
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