Fig. 4.
Titration of taurine into a human urine sample: a integral of 1D TOCSY spectrum around 3.28 ppm; b integral of 1D proton spectrum around 3.28 ppm; c integral of 1D TOCSY spectrum around 3.45 ppm; and d integral of 1D proton spectrum around 3.45 ppm. Experimental parameters were similar to those used for Fig. 2. Note that ordinate offsets in (c) and (d) are due to contributions from histidine, TMAO and other species