Figure 1
The two alternative ways of stacking two dipeptide molecules with slightly different geometry in a two-dimensional hydrophilic sheet. The pattern to the left eventually proved to be correct (see text for the significance of the two arrows). The indication of the axes directions (view along the b axis) pertains to the final, correctly assigned P21 space-group setting of LVE. In Figs. 1 and 4, peptide side chains, Cα-bonded H atoms and the alcohol molecules have been removed for clarity. |