Table 2.

Change in Ion-Accessible Volume per Protein in Lysozyme and Chymosin Crystals

Size of Ions ($\text{Å}$)	Lysozyme (${\text{Å}}^3$)	Chymosin (${\text{Å}}^3$)
$1.25\left({\text{NH}}_4^{+}\right)$	800	1820
$1.50\left({\text{Cl}}^{-},{\text{K}}^{+}\right)$	1200	3200
$1.67\left({\text{Na}}^{+}\right)$	2000	4800