Fig. 4From: Gene expression of vascular endothelial growth factor A and hypoxic adaptation in Tibetan pigExpression of VEGFA proteins in the heart (a), liver (b), and kidney (c). Each bar represents mean ± S.E. * Significant difference (P < 0.05), ** Extreme significant difference (P < 0.01). TP = Tibetan pig (n = 10); YH = Yorkshire pig raised at high-altitude (n = 10); YL = Yorkshire pig raised at lowland (n = 10)Back to article page