Fig. 1From: Molecular characterization of irinotecan (SN-38) resistant human breast cancer cell linesSensitivity to SN-38 in the established SN-38 resistant cell lines in comparison to their controls. Using MTT assay, cells were exposed to the shown SN-38 concentrations for 72 h. Triplicate wells were analyzed, and data shown is mean ± s.d. of a representative experiment in percentage. n = 3Back to article page