Cell viability assays in a lung cancer cell line (A549), in normal (MRC5) lung cells, a cervical cancer cells (HeLa) and in a chronic myleloid leukemia (K562) cells upon incubation with the Cyt c-Tf conjugate.

<p>(A) Cell viability assay (MTS) in A549 cells to determine the IC₅₀ value of Cyt c-Tf conjugate. Cells were treated with an increasing amount of Cyt c-TF. (B) Equimolar concentrations (50 μM) of cisplatin, Cyt c-Tf, Cyt c, and Tf were incubated with MRC5 cells (C) HeLa and (D) K562 cells and subsequently cell viability was tested by MTS assay. * Indicates P<0.05, significant difference from control cells as assessed by two tailed unpaired t-test with n = 4.