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Moths depend on olfactory cues such as sex pheromones to find and recognize mating partners.Pheromone receptors (PRs) and Pheromone binding proteins (PBPs) are thought to be associated with olfactory signal transduction of pheromone compounds in peripheral olfactory reception.We identified and cloned three PBPs and six PRs from the antennae of Plutella xyllotella.The three PxylPBP genes are not only expressed in chemosensory tissues but also expressed in female reproductive organs and male legs.