Estimating The NO of Molecules in ASU
Most protein crystals contain about 50% water. The number of protein molecules in the asymmetric unit of a crystal can be estimated with Matthews_coef. Biochemical data is also important.
Vm = cell volume ( cubic As) V
----------------------- = ---
M = molecular weight of protein in daltons
Z = no. of molecules in unit cell. = nasymu*nmols_asu
nasymu = number of asymm. units
nmols_asu = number of molecules in asym unit.