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Whole mount in situ hybridization of CACNA1D and CACNA2D1 in E7 feather forming and E9 scale forming regions. A, B) CACNA1D; C, D) CACNA2D1; E, F) control; A, C, E) E7 feather forming region; B, D, F) E9 scale forming region. Arrows in B and D indicate higher expression levels in the scale forming regions.
