410405.fig.001a
(a)
410405.fig.001b
(b)
Figure 1: (a) Satellite cell density (number of satellite cells/1000  𝜇 𝑚 2 of muscle) in the biceps and quadriceps muscles of adult and old rats (mean ± SE). Asterisks show significantly different values ( 𝑃 < 0 . 0 0 1 for both muscles). The inset shows a satellite cell labeled with the anti-N-CAM antibody (green fluorescence); DNA was stained with Hoechst 33258. Bar: 10  𝜇 m. (b) Percentage of apoptotic satellite cells in the biceps and quadriceps muscles of adult and old rats (mean ± SE). The values were not significantly different ( 𝑃 = 0 . 1 3 6 for biceps and 𝑃 = 0 . 1 5 7 for quadriceps). The inset shows an apoptotic satellite cell (green fluorescence); DNA was stained with Hoechst 33258, note the marginated chromatin. Bar: 10  𝜇 m.