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  • Title: Comparative immunohistolocalization of carbonic anhydrase isozymes I, II and III in the equine and bovine digestive tract.
    Author: Sasaki K, Igarashi S, Amasaki T, Amasaki H, Nishita T, Kano Y, Asari M.
    Journal: Histochem J; 1993 Apr; 25(4):304-11. PubMed ID: 8491671.
    Abstract:
    Immunohistochemical localizations of carbonic anhydrase isozymes (CA-I, CA-II and CA-III) in equine and bovine digestive tracts were studied. In the horse, epithelial cells in both the oesophagus and non-glandular part of the stomach lacked all three isozymes. In contrast, surface epithelial and parietal cells in the glandular region of the stomach showed reactivity for CA-II. In the small intestine, absorptive columnar cells covering the villi in the duodenum were positive for CA-II. The epithelium of the jejunum and ileum lacked all three isozymes. In the large intestine, CA-II was detected in the columnar cells in the upper part of the crypt. In cattle, epithelial cells of the oesophagus showed reactions for CA-I and CA-III but not for CA-II. Although the absorptive epithelial cells of the small intestine lacked CA-I, CA-II and CA-III, those of the upper part of large intestine crypts were heavily stained for all three isozymes.
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