The Isolation and Properties of Some Soluble Proteins From Wool II. the Preferential Extraction of High-Sulphur Proteins

Abstract

A study has been made of the preferential extraction of high· sulphur protein components from wool by alkaline solutions of potassium thioglycollate. It was found that in general the high. sulphur proteins were extracted in quantity at lower values of pH, temperature, and time than the low· sulphur proteins. The extraction of low· sulphur proteins was repressed by small increases in salt concentration and by the addition of divalent cations such as zinc and calcium, whereas the solubility of the high. sulphur proteins was much less affected by these additions.