Fig. 7. The relationship between D_|| at a diffusion time of 100 ms and the reciprocal of the square root of the relative molecular mass M_r. The arginine phosphate and ATP D values were collected using ³¹P-NMR, while the values for betaine and arginine/arginine phosphate were collected using ¹H-NMR. The D values for lactate and alanine are from Kinsey and Ellington (1996). See text for additional details.