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SXRF scans (5 µm) of Ca, P, Sr and Zn in a region of regular compensatory cellular cementum in the upper incisor root of Pan (UCL-CA-14E). The green bar (1350 µm long) on the Zn map (d) indicates the plane of SXRF Ca, P, Zn and Sr concentrations (ppm) plots. The red arrows in (e) show regions where Zn and Sr concentrations are reciprocal. Colour scales beneath each image denote concentration (ppm). (Online version in colour.)
