Process for producing lactoperoxidase

摘要

Provided is a process for producing lactoperoxidase comprising: a step (1) for bringing one or more milk materials into contact with a cation exchanger having weakly acidic groups as ion exchange groups to thereby effect adsorption treatment; a step (2) for washing the cation exchanger after said adsorption treatment; a step (3) for bringing said washed cation exchanger into contact with a leaching solvent which elutes lactoperoxidase, to thereby obtain a leaching solution having lactoperoxidase eluted into said leaching solvent; a step (4) for concentrating said leaching solution through an ultrafiltration membrane to thereby effect precipitation in the concentrated leaching solution; and a step (5) for obtaining a lactoperoxidase solution by removing the precipitation from said concentrated leaching solution. Further provided is a similar process wherein the purity of solid lactoperoxidase s 80% or more.