Figure 1: The confocol imaging of double stain of utrophin and dystrophin antibody of the muscle tissue of the four groups mice. A: The confocol imaging of double stain of utrophin and dystrophin antibody of skeletal muscle piece of C57BL/6 mice; The membrane show utrophin (FITC) and dystrophin (Cy3) mixed colour: bright yellow.( ×400). B: The confocol imaging of double stain of utrophin and dystrophin antibody of skeletal muscle piece of controlled mdx mice; The membrane only show the colour of utrophin: bright green.( ×400). C: The confocol imaging of double stain of utrophin and dystrophin antibody of skeletal muscle piece of 6 weeks age mdx mice; 16 % membrane show dystrophin and utrophin’s colour : bright yellow. The rest show the colour of utrophin : bright green.( ×400). D: The confocol imaging of double stain of utrophin and dystrophin antibody of skeletal muscle piece of 12 weeks age mdx mice; 7 % membrane show dystrophin and utrophin’s colour : bright yellow. The rest show the colour of utrophin: bright green.( ×400).