Villin (Autostainer Link 48)

Villin is a 95 kDa calcium-regulated, actin-binding protein that plays a role iin regulating actin filament assembly. It is a major constituent in the microvilli, which compose the brush border of epithelial cells forming absorptive surfaces of the intestinal and renal proximal tubular epithelia. In normal human tissue, villin is expressed by a limited number of simple epithelia of the gastrointestinal and urogenital tract. Antibodies to villin are a useful aid for classification of primary and metastatic colorectal carcinomas.