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Chemical Senses 2005 30(2):105-110; doi:10.1093/chemse/bji005
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Chemical Senses vol. 30 no. 2 © Oxford University Press 2005; all rights reserved.

Specificity of Odorant-evoked Inhibition in Lobster Olfactory Receptor Neurons

Richard E. Doolin and Barry W. Ache

Whitney Laboratory, Department of Neuroscience, Center for Smell and Taste and McKnight Brain Institute, University of Florida, Gainesville, FL 32610, USA

Correspondence to be sent to: B.W. Ache, Whitney Laboratory, University of Florida, 9505 Ocean Shore Blvd, St Augustine, FL 32080, USA. e-mail: bwa{at}whitney.ufl.edu

Lobster olfactory receptor neurons, like those of many animals, use two modes of olfactory signaling, excitation and inhibition to code olfactory information. Inhibition appears to act through two distinct ionic mechanisms. Here we show that neither ionic mechanism is odor-specific, providing further support for the emerging understanding that there are no inhibitory odorants per se, but rather that the action of a particular odorant is inherent in the olfactory receptor cell on which an odorant acts.

Key words: olfaction, lobster, sensory transduction, ORNs


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