Fig. 1.
A: equation for ATP hydrolysis. B: 31P magnetic resonance spectra recorded from a perfused rat heart. B, top: the arrow indicates a (“neutral”) region of the spectrum being irradiated with saturating pulses, and this spectrum does not otherwise differ from an unirradiated spectrum (not shown). B, bottom: the effects of irradiating ATPγ are shown. Reductions in the areas of the phosphocreatine (PCr) and inorganic phosphate (Pi) resonances are obvious. This cartoon is based on data reported previously (20, 21, 43).