SK regulates proteins involved in apoptosis. (A) Western blot for the expression of Bax and Bim. (B) Bcl-2 and Bim expression under normal culture conditions (HM) and in response to 6 hours of SF conditions with and without 20 μg/mL of rabbit polyclonal anti–PECAM-1 antibody (RP). The loading control of VEGF-RII expression in panel A and Akt in panel B is shown.