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Subcellular Fractionation from Fresh and Frozen Gastrointestinal Specimens.

The purpose of this protocol is to fractionate human intestinal tissue obtained by endoscopy into nuclear and cytoplasmic compartments for the localization analysis of specific proteins or protein complexes in different tissue states (i.e., healthy vs. disease). This method is useful for the fractionation of both fresh and frozen intestinal tissue samples; it is easily accessible for all laboratories and not time consuming.