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On the Trail of an Odor Map
Nobel winning work has a way to go
The Scientist 2004, 18(20):22
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A smell can conjure intimate memories and even change behaviors. Scent is primal, so closely related to territoriality, predation, food, and sex in many animals, yet to most humans it seems an accessory, like a dab of perfume. People devote much more conscious attention to vision and taste, which have three and five receptor types, respectively. The human genome, however, has 350 intact odorant receptor genes, and other mammals have many times that amount suggesting that olfaction plays a more profound role.
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