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Fig. 4. Y. pseudotuberculosis induces Pyk2 autophosphorylation. Representative immunoblots containing lysates from Fak-/- MEFs (lanes 1-4) or J774A.1 macrophages (lanes 5-8) following infection with the indicated strains of Y. pseudotuberculosis. Lysates were immunoblotted for phospho-Y402 (upper panel) or Pyk2 (lower panel).