Fig. 2
Alterations in caspase activity but not viability of HaCaT keratinocytes exposed to Z-Gly-RGD(DPhe)-mitP. Cells were treated with Z-Gly-RGD(DPhe)-mitP in serum-free medium for 24 h prior to (a) assessment of caspase 3/7 activity with a luminescence assay and (b) evaluation of cell density using the SRB assay. Data were pooled from three independent experiments performed in triplicate (a) or quadruplicate (b). Data shown are means + SEM; *p < 0.05; ***p < 0.0001 unpaired t test with Welch’s correction compared to the 0 μmol L−1 controls