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Representative histology obtained after intra-colonic instillations for 120 min. H&E (upper panels, (A–F)) and alcian blue (lower panels). (A) insulin (50 IU/kg); (B) insulin/1 mM SL; (C) insulin/10 mM SL; (D) insulin/25 mM SL; (E) insulin/50 mM SL; (F) insulin/25 mM C10. Bar = 250 µm.
