Rapid evaluation of the initial and equilibrium parameters of CsCl and RbCl in equilibrium ultracentrifugation.

Two types of tables and graphs have been calculated. One type relates the initial density of the gradient solution to its equilibrium density at the bottom of the tube. The other type lists the function I(p) (defined by C. R. McEwen, 1967, Anal. Biochem.19, 23–29) and can be used to obtain the equilibrium density at any radius from the axis, provided the equilibrium density at one radius is known. Tables are calculated for CsCl and RbCl as gradient materials, and for Beckman Instruments rotors SW 41 and SW 65.