Immunoblot and immunohistochemical analyses were performed according to the method described previously [18 (link), 34 (link)]. Rabbit polyclonal antibodies against DTX3L/Dtx3l (Santa Cruz), phosphorylated threonine 202 in ERK1 and phosphorylated tyrosine 204 in ERK2 (Cell Signaling), phosphorylated tyrosine 397 in FAK (Invitrogen), phosphorylated MEK1/2 (Cell Signaling), PI3K and phosphorylated PI3K (Cell Signaling); rabbit monoclonal antibodies against Akt and phosphorylated Akt (Cell Signaling); and mouse monoclonal antibodies against alpha-TUBULIN (SIGMA), MEK1/2 (Cell Signaling), ERK1/2 (Cell Signaling) and FAK (Millipore) were used as first antibodies. Immunohistochemistry was performed according to the method previously described [34 (link)].
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