Figure 2. PRESS 60 ¹H-MR spectra of (a) model (b) porcine in vitro gallbladder bile and (c) human in vivo gallbladder bile. The various resonances are labelled (TMA, trimethylamine). The peak at 4.7 ppm in (c) is a residual water resonance that has not been fully suppressed during the in vivo experiment.