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. Author manuscript; available in PMC: 2012 Apr 1.
Published in final edited form as: Exp Gerontol. 2010 Nov 21;46(4):282–291. doi: 10.1016/j.exger.2010.11.004

Figure 3.

Figure 3

MAPK expression and phosphorylation in young and old muscles by origin. Representative western blots (A) in which each antigen row is from a single blot, with the muscles rearranged for clarity. A significant interaction effect (p=0.03) on ERK phosphorylation (B) indicates that the decline with age in somitic locomotion muscles is different than the conservation in mastication muscles. No effects on ERK2 expression (C) were found. The significant interaction effect (p=0.002) on phosphorylation of p38 (D) indicates that the increase with age in branchial arch muscles is different than the conservation seen in somitic muscles. No effects on JNK phosphorylation on T54 (E) were found. Data are presented as difference of logs from young averages, expressed as mean ± S.D..