Abstract
A specific enzymatic method to determine the amounts of itoic acid, a Bacillus subtilis siderophore, and 2,3-dihydroxybenzoic acid (2,3-DHBA) was devised. A sample was incubated first with hippurate hydrolase and then with 2,3-DHBA-3,4-dioxygenase. Itoic acid was estimated from the increase in A374. The incubation with the first enzyme was omitted for the determination of 2,3-DHBA.
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