Fig. (2).

Typical example of the ESR spectra obtained from 10⁷ equine endothelial cells submitted either to normoxia (A) or to 3 cycles of anoxia/reoxygenation in the presence of the spin trap 50 mM POBN/2% ethanol (B). The spectrum B shows a triplet of doublets, characteristic of a POBN adduct with an ethoxy radical. Results from 3 separate experiments.