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- Bovine odour excites olfactory receptor(s) in a wall-pore olfactory
- sensillum on the anterior pit of Haller's organ in Amblyomma
- variegatum. Gas chromatography-coupled electrophysiology recordings
- from this sensillum reveal the presence of 4 active compounds in
- bovine odour. The two strongest stimulants were identified as
- 2-nitrophenol and 4-methyl-2-nitrophenol by gas chromatography-coupled
- mass spectrometry, and by matching electrophysiological activity of
- synthetic analogues. Synthetic analogues of known
- vertebrate-associated volatiles also stimulate other olfactory
- receptors in sensilla on the surface of tarsus I: a lactone receptor
- responding to gamma-valerolactone and 6-caprolactone; different fatty
- acid receptor types responding best to either pentanoic acid,
- 2-methylpropanoic acid or to butanoic acid; three receptors responding
- to NH3; and one receptor responding to 3-pentanone. Gas
- chromatography-coupled mass spectrometry analysis of vertebrate
- volatiles revealed presence of a number of these olfactory stimulants
- in concentrates of rabbit and steer odour, i.e. 2-methylpropanoic
- acid, butanoic acid, 3-methylbutanoic acid, pentanoic acid, and
- gamma-valerolactone.
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