Although the phase behavior of the three
proteins is quantitatively different, general trends emerge. Stable crystal nucleation does not occur within the
salting-in region for the proteins examined, despite the crystal being observed as the most stable solid phase.
Instead, two types of amorphous phases were found within the salting-in region; additionally, an analog to
the instantaneous clouding curve was observed within the salting-in region for chymosin B. Also, protein
solutions containing sulfate salts resulted in different crystal morphologies depending on whether Li2SO4 or
(NH4)2SO4 was used.