“It’s the first time that we are able to find, at the level of these synapses, a substance that fills all the criteria of a neurotransmitter,” co-author Leslie Stone, from Colorado State University in Fort Collins, Co., told The Scientist. “This doesn’t rule out the involvement of serotonin or other substances in the taste bud, we just believe they’re acting at another level, probably in the crosstalk between cells.”

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