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Fig. 6. Distribution of membrane-bound Ca2+ in different skin layers of
adult chickens. (A) Specific fluorescence, obtained with the fluorescent
Ca2+-sensitive probe chlorotetracycline, in one laying female. (B)
Distribution of Ca2+ in different skin layers of one male chicken.
ST-SC, innermost SC and the interface between the ST and SC; EPI,
mid-epidermis; D, outermost dermis. Short arrows denote the basal lamina. Bar,
10 µm.