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Biogenic monoamines and related compounds were analyzed in the brain and the corpus cardiacum of normal and albino strains of the migratory locust, Locusta migratoria, using a three-dimensional HPLC system with multiple coulometric electrochemical detection. Evidence for the following metabolic pathways was obtained: tyrosine-4 → dihydroxyphenylalanine (l-dopa) → dopamine → norepinephrine → epinephrine;...
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