THE HISTOCHEMICAL DEMONSTRATION OF INTESTINAL
-d-FUCOSIDASE WITH 5-BROMO-4-CHLOROINDOLE-3-yl-
-d-FUCOPYRANOSIDE
JOHN R. ESTERLY 1,
ALFRED C. STANDEN 1, and
BJARNE PEARSON 1
1 Medical Sciences Laboratory, Fort Detrick, Frederick, Maryland
Enzymatic hydrolysis of a halogen-substituted indolyl substrate for
-d-fucosidase shows a strong positive reaction in the interstitial mononuclear cells in the jejunum. This localization and the optimum pH are different from that of the analogous substrate for 3-d-galactosidase. The results of competitive inhibition of these substrates suggest that the reactions demonstrate distinct but similar tissue enzymes.
Submitted on January 25, 1967