Add time:09/03/2019         Source:sciencedirect.com

A TLC method was developed that allows the evaluation of the 7,8-dihydropteroate synthase reaction via determination of the stable PTEROIC ACID (cas 119-24-4) (PtA), obtained by chemical oxidation of the enzymatic product dihydropteroic acid (H2PtA). Using amino-bonded HPTLC plates and solution of 52% acetonitrile in 100 mM Tris-HCl buffer (pH 8.6) as the mobile phase it is possible to separate all enzyme substrates and competitively formed drug analogues of PtA from the oxidized enzymatic product. The method allows the detection of PtA at levels down to 0.5 ng/μl.

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