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Fig. 1. Expression pattern of ß-catenin in developing wing buds of chicken embryo. (A) Type II collagen and ß-catenin in wing buds of day 5 and 6 chicken embryos were detected by immunohistochemistry. Accumulation of sulfated proteoglycan was detected by Alcian Blue staining. (B) Higher magnification in area between differentiating cartilage (C) and non-cartilage (NC) at day 6 embryo.