Fig. 9.

Overview of Xenopus epidermal cell types and secretions. The epidermis of late tailbud/tadpole embryos has four cell types: ciliated cells, ionocytes, goblet cells and small secretory cells. Otogelin-like is a major secretory glycoprotein secreted from goblet cells and SSCs. Goblet cells also secrete the lectin, Xeel. SSCs also secrete another granular material in their vesicles that has yet to be identified. Other innate defence molecules found in secretions include vitellogenin, apolipoprotein b, complement factors (C3 and C9) and FCGBP/FCGBP-like proteins.