Abstract
Further observations have been made on a method of determining the activity of the rat-liver enzyme system which is able to desulphate L-serine O[s35]-sulphate. The desulphating enzyme is mainly localized in the cell sap of the liver cell. Its distribution in the cell differs from that of any known mammalian sulphatase enzyme. The enzyme is present in human, ox, sheep, pig, mouse, chicken and salmon livers, but signifi-cant amounts could not be detected in a number of lower organisms that were examined.