Figure 1: Effect ofanti-HER2 monoclonal antibody herceptin on SK-BR-3 cell proliferation. Cell number was determined on thethird, seventh and tenth day using the hemocytometer. (A) 3000cells/ml per well were seeded on day 0. (B) 10,000 cells/ml per well were seeded. Each count wasdone in duplicate with the error bars representing +/- SD.