Figure S1. Expression of Dp-actin has no detrimental effect on actin organization in COS7 cells. (A) The level of expression of Dp-actin. COS7 cells were transfected with Dp-actin or empty vector (Mock). Cell lysates were analyzed by immunoblotting with anti-actin antibody (C4, Chemicon). Densitometric analysis indicated that the amount of Dp-actin was