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Western blot analysis of receptor, Shc, Mek, and Erk expression in PC12 cells and 4−/4+ embryoid bodies. (A) TrkA/TrkC receptor (molecular weight: 145 and 140 kDa, respectively)—both Western blots were developed for the same amount of time. (B) Shc (molecular weight: 46 kDa). (C) Mek (molecular weight: 45 kDa). (D) Erk (molecular weight: 42 kDa).
