Mice were used at 48 weeks old. Local field potentials (EVG) were recorded from the
luminal surface of intact VNO sensory epithelia9
. 2,5-dimethylpyrazine, 2-heptanone,
n-pentyl acetate and isobutylamine were purchased from Aldrich; 2-sec-butyl-4,5-
dihydrothiazole from Alfa Aesar; and farnesene from Bedoukian Research.
Received 24 January; accepted 20 June 2002; doi:10.1038/nature00955.
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