Figure 4From: Ectodermal Wnt6 is an early negative regulator of limb chondrogenesis in the chicken embryoComparison of the expression domains of Sox9 and Wnt6 in the limb. Slightly oblique transverse sections of wing buds at HH-stage 24. A Sox9 expression is limited to the chondrogenic region, which is located in the center of the limb bud mesenchyme. B Wnt6 is expressed in the entire circumference of the limb bud ectoderm. Scale bar 500 μmBack to article page