Figure 1. A coresonance experiment from a malignant hyperthermia-susceptible muscle muscle perchloric acid extract before (A) and after (B) sequential addition of phosphodiester standard compounds to assign the resonance of the phosphodiester region. The³¹Phosphorus spectra were acquired at 9.4 T with a 4.05-s pulse repetition rate. GPE = glycerophosphorylethanolamine; GPI = glycerophosphorylinositol; GPC = glycerophosphorylcholine; GPS = glycerophosphorylserine.