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Nature Chemical Biology 5, 456–457 (1 July 2009) | doi:10.1038/nchembio0709-456

Research highlights

Nod to a new neurotransmitter Classical biogenic amines such as dopamine and serotonin are well-established regulators of animal behavior. The animal nervous system also produces a variety of other biogenic amines, but the biological roles of these trace amines remain unclear.