HUVEC transfected with control siRNA (A–C) or TXNIP siRNA (D–F) were immuno-stained for F-actin (A, D), Src pY416 (B, E) or presented as merged image (C, F). White arrows demonstrate sites of F-actin and Src pY416 colocalization. (G) Stress fiber area was measured and analyzed for signal intensity using Image J (* P<0.05 vs. control siRNA, n=4).