Größenbestimmung biologischer Partikel durch Gelchromatographie an Sepharose 6B / Determination of Particle Size by Gel Chromatography with Sepharose 6B

Abstract

Gel chromatography with 6% agarose gel (Sepharose 6B) can be used for measuring the Stokes’ radius of biological particles within the range of 1,5 nm and 35 nm. The molecular weight determination of proteins is not very reliable with this method. Hepatitis sera have been chromatographied to measure the size of hepatitis associated antigen (Australia-antigen). The radius of this antigen was determined to be 10,3 nm, which agrees with the results of electron microscopy and ultracentrifugation. The Stokes’ radius of human serum IgM was found to be 10,6 nm.