ESR spectra in cell-free settings by 1 mg/ml a) MWCNT
and b) MWCNT
in buffer, buffer with BSA, medium and medium with BSA. The unique peak has a g-value of 2.025 and half-width of 1.7 mT. c) Intensity of cell-free unique radical formation by MWCNTLNL1 and MWCNTLNL2 in buffer, buffer with BSA, medium, and medium with BSA. Columns represent the peak surface, i.e. area under curve (AUC), obtained by double integration of the unique peak (±SD). Statistically significant differences are indicated by an asterisk (P < 0.05). d) ESR spectra by MWCNTLNL1 in cell-free settings (in buffer with BSA) with and without DMPO and/or H2O2, and with the iron chelator deferoxamine (DFO). Spectra are shown at identical intensity scale.