Abstract
The local anaesthetic, nupercaine, acts as an inhibitor of potato tuber lipoxygenase (LOX), when the incubation mixture also contains Triton X-100. The inhibition appears to be due to a change in the physical structure of the lipid substrate induced by nupercaine, rather than a direct effect on the enzyme. The assay of potato tuber lipolytic acyl hydrolase (LAH) by a coupled reaction involving LOX does not give an accurate estimation of lipolytic acyl hydrolase activity and the inhibition by nupercaine, of such an assay, is due to the inhibition of lipoxygenase activity by the combined presence of nupercaine and Triton.
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