Markers to identify the absorptive cell lineage.

<p>Identification of absorptive enterocytes in porcine small intestine and colon are shown. Immunostaining for enterocytes demonstrates sucrase isomaltase, a digestive enzyme, marking the apical brush- border of cells in the small intestine. Carbonic anhydrase, a digestive enzyme, positively identified absorptive cells in the colon with staining localized to the apical brush- border of these cells. All specific markers (red). Nuclei (blue). Scale bar 200 µm, inset scale bar 50 µm.