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. 2002 Sep;161(3):895–907. doi: 10.1016/S0002-9440(10)64250-2

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Copyright © 2002, American Society for Investigative Pathology

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Figure 7. — The LacZ-positive cells isolated within the pp1/pp2 fraction from the injured muscle at 2 weeks after laceration (A, C) were also positive for α-SMA (B) and vimentin (D). The percentage of LacZ-positive cells isolated within the pp1/pp2 and pp4/pp5 fractions from the injured and control skeletal muscles at 5, 7, and 9 weeks after implantation revealed that: 1) a significantly higher percentage of LacZ-positive cells was found in the pp4/pp5 fraction than in the pp1/pp2 fraction from the injured muscle at 1 week after injury; 2) a similar percentage of pp1/pp2 and pp4/pp5 cells were LacZ-positive at 3 weeks after injury; and 3) the percentage of LacZ-positive cells was significantly higher in the pp1/pp2 fraction than in the pp4/pp5 fraction at 5 weeks after injury. In contrast, a significantly higher percentage of LacZ-positive cells were consistently found in the pp4/pp5 fraction than in the pp1/pp2 fraction at all time points tested in the control muscle (5, 7, and 9 weeks after transplantation). **, P < 0.01.