PROCESS FOR THE ISOLATION OF FERMENTATION PRODUCTS

摘要

The invention provides a process for the production of ethanol and a protein or peptide which is heterologous to yeast which comprises fermenting an aqueous carbohydrate-containing medium with an industrial yeast strain which has been genetically modified to be capable of expressing a heterologous protein or peptide, under conditions such that the yeast multiplies but no expression of the said heterologous protein or peptide takes place, recovering the ethanol so-formed, inducing expression of the said protein or peptide by the yeast, and obtaining the said heterologous protein or peptide therefrom. The process may be applied to the industrial production of alcoholic beverages such as beer or distilled alcohol. The yeast inevitably obtained as a by-product in the process has improved value because it provides a source of the heterologous protein or peptide. Heterologous protein and peptides which may be produced by the new process include enzymes such as beta-lactamase, beta-glucanase and beta-galactosidase and proteins of therapeutic value such as human serum albumin.