Fig 4
(A) Simplified scheme of the catabolism of dopamine and serotonin in the zebrafish brain. Each arrow represents a distinct enzymatically-catalyzed step. Grey arrows indicate the reactions catalyzed by the combined action of monoamine oxidase (MAO)/aldehyde dehydrogenase. Abbreviations: 3-MT, 3-methoxytyramine; 5-HIAA, 5-hydroxyindoleacetic acid; 5-HT, serotonin; DA, dopamine; DOPA, 3,4-dihydroxyphenylacetic acid; HVA, homovanillic acid; NA, noradrenalin. (B-H) Levels of biogenic amines and their catabolites in the brain of adult maternal-zygotic