Fig. 3.
Immunohistochemical staining of P-gp in parental P388 and the vincristine-treated derivative, P-V4.
Representative results of immunohistochemical staining of P388 (upper left) and P-V4 (upper right). Lower panels show positive (LV500, right) and negative controls (L cell, left). Arrows indicate stained P-gp on the cell surface.
