Figure 2
![Figure 2](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2F1471-2334-10-120/MediaObjects/12879_2009_Article_1100_Fig2_HTML.jpg)
Endogenous H 2 O 2 concentration in CVF samples measured at 0, 1, 15 or 240 minutes exposure to air following four hours hypoxic incubation (open circles), or immediately after sample collection entailing ~1 minute exposure to air (closed circles, n = 16).