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The biopterin cycle is responsible for the synthesis of two essential starting substances for hormones and neurotransmitters: 5-HTP (serotonin, melatonin) L-dopa (dopamine, adrenaline, noradrenaline) We will now take a closer look at these two substances

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Cage return reaction In the course of a chemical reaction, the reaction between two transient products before they diffuse out of the 'solvent cage'