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. 2020 Apr 7;31(1):107490. doi: 10.1016/j.celrep.2020.03.054

Figure 3.

Figure 3

Progressive Reduction of AER-Fgf8 Expression Correlates with the Loss of Digit I and the Reduced Length of Digits II and V in Pig Limb Buds

(A and B) Comparative analysis of Fgf8 expression during handplate (A) and digit ray development (B) in mouse and pig limb buds. Black arrowheads in (A) point to the posterior-proximal limit of Fgf8 expression. Right panels in (B) are close-ups of the anterior margins of the limb buds shown in the left panels.

(C) Mouse (E13.25) and pig forelimbs (D30) stained with Alcian blue to reveal the cartilage condensation patterns that prefigure the definitive digit rays.

Asterisks indicate vestigial digit I condensation. Scale bars, 0.25 mm. n = 2 per stage for all pig ISH probes and skeletal stainings; n = 3 per stage for all mouse ISH probes and skeletal stainings.