A method is provided for obtaining .beta.-casein from skim milk. Purificationof .beta.-casein from milk is achieved through a process of microfiltrationusing cross-flow polymeric microfiltration membranes. Cooling of the milkprior to microfiltration results in improved separation of .beta.-casein fromthe other milk serum proteins. Further filtration and demineralization of themicrofiltered permeate results in enrichment of the fraction containingsoluble .beta.-casein. An integrated scheme that allows a dairy plant tocontinuously separate and purify .beta.-casein is provided. Also provided is amethod for obtaining cheese with improved meltability and reduced bitterness.
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