Comparison of muscle gene expression between PCS affected and normal muscles. Quantitative expression of MYHslow, MYH2x and MYH2b in ST, LD and G muscles, presented as combined results of 4 sets of 2-day-old PCS piglets. Differences between pair-wise combinations of the least square means were tested for significance (*p < 0.05). PCS piglets showed significantly lower expression of MYHslow in LD and G muscles, and lower expression of MYH2x and MYH2b in ST muscles. Asterisks indicate statistical significance between normal and PCS muscles. Error bars indicate standard error.