Figure 4.
A) Delmarine binds to Fe2+, Fe3+, Zn2+, and Cu2+ in phosphate buffered saline but not to Mn2+, Mg2+, or Ca2+ as assessed by UV-Vis spectroscopy. B) Only addition of Fe3+ and Fe2+ rescues delmarine-induced cell death in HT1080 cells as assessed by alamar blue (48 h), N = 3.