Fig. 5: Schematic representation of reversible vs. irreversible NO sensor and example of NO level found in aortic endothelial cells.
From: Combining nitric oxide and calcium sensing for the detection of endothelial dysfunction

a Reversible vs. b irreversible NO sensing probes, and relation of reversibility to time-dependent NO level detection. c Maximal NO concentration measured in vitro in endothelial cells of aorta (Reprinted with permission from ref. 51). All NO levels measured with an electrochemical NO sensor.