Preservation of mucusIn situ in rat colon

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Abstract
Mucus, a hydrated complex consisting mainly of glycoproteins, forms a layer over the epithelial surface of the gastrointestinal tract. The usual preparative procedures for histological and scanning electron microscopic examination of the gut result in the loss or distortion of this mucus layer. Careful evaluation of two new methods reported to stabilize the mucus layer showed that acrolein vapor did not provide adequate fixation, but application of heat-inactivated antiserum raised in rabbits against rat colon mucus reliably preserved a continuous layer closely adherent to the epithelium. This stabilized layer is continuous with the mucus in the colonic crypts.

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