Additional file 1: Figure S1. of PAX7 is required for patterning the esophageal musculature

Pax7 +/+ and Pax7 +/− esophagi have similar luminal diameter, esophageal length, and location of the skeletal-smooth muscle boundary. (A) Cross-sections of mid-region (Mid) esophagi from P21 mice of the indicated genotype were used to quantify luminal diameters. Values are means ± SD, n = 3. (B) Longitudinal sections of P21 Pax7 +/+ and Pax7 +/− esophagi were stained with antibodies to αSMA and SA and with DAPI. The length of the entire esophagus was measured, as was the location of the skeletal-smooth muscle boundary. Values are means ± SD, n = 3. Pax7 +/+ and Pax7 +/− esophagi were not different in these parameters.