Vuc=43.28*48.42*59.71;  % Volume of unit cell
M=14614.66;             % g/mol
mol=6.022142*10^23;     % 1/mol
M_molecule=M/mol;       % g
Vspm=M_molecule*0.73;   % cm^3 |Volume occupied by single protein
                        % molecule (no solvent)
Vspm_ang=Vspm*(10^8)^3; % Å^3
V_protein=Vspm_ang*4;   % Since 4 molecules / unit cell
                        % This is the volume occupied by the protein
                        % without solvent in the unit cell.