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Fig. 3. White muscle PCr (A) and pHi (B) in carp exposed to normoxia and
hypoxia for up to 3 h at 15°C (squares) and 25°C (circles).
Phosphocreatine levels are normalized to the sum of PCr and Pi, and
expressed relative to normoxic controls. NMR data were collected at the
fishes' acclimation temperature and for each time point an average consisting
of 256 spectra gathered over 5 min is shown. The black horizontal bar
immediately above the x-axis indicates the period of hypoxia exposure
(PO2=20 Torr). Each point represents mean
± s.e.m. N=7–10 for each point.