Abstract: The invention relates to the treatment of cakes and seeds of vegetable origin for obtaining proteins useful in animal or human feeding.It consists in subjecting a cake or seeds, under maceration conditions, to the action of at least one microorganism in separating the insoluble products from the reaction medium, in solubilizing the proteins contained in said insoluble products by means of an alkali and in precipitating and biologically coagulating the said proteins at their isoelectric pH.Protein isolates obtained according to the process of the invention are suitable to human and animal feeding.

Abstract: A process for improving the value of cakes of vegetable origin is described. The crude cakes are macerated in an aqueous medium with strains of microorganisms, notably the yeast Geotrichum candidum. The cakes are thus freed from the sulphur-containing impurities and aflatoxins which contaminate them and limit their use at present. The cakes obtained have an improved nutritive value. New, pure proteins can be isolated from the maceration liquids by precipitation to the isoelectric pH or in the presence of saline solutions.