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Fig. 2. Reverse-phase HPLC radiochromatograms of the enzymatic products from
incubation of honey bee brain extracts with [ring-3H]tyramine.
Large arrowhead indicates the elution of synthetic OA and the small arrow
indicates the elution of synthetic tyramine as detected by electrochemical
detection. Dark trace: radiochromatogram of the enzymatic products from
untreated brain extracts. Light trace: compounds recovered from boiled enzyme
reaction.