An update on extra-oral bitter taste receptors

Table 3 Expression and distribution of TAS2Rs in different normal tissue types of other species

System		Receptor type	Methods	Refs.
Respiratory system	ASM	pTAS2R3,-4,-10	RT-PCR	[98]
Cardio-vascular system	Heart	rTAS2R13,-38,-40,-103–110,-113,-114,-116–121,-123–126,-129,-130,-134–137,-140,-143	ISH, qRT-PCR	[203]
	Arteries	rTAS2R39,-40,-108,-114,-130,-137,-140	IFC, RT-PCR, WB	[208]
Nervous system		rTAS2R4,-10,-38,-109,-144	IHC, IFC, RT-PCR, WB	[189– 191]

*ASM airway smooth muscle, IFC immunofluorescence, IHC immunohistochemistry, ISH in situ hybridisation, pTAS2Rs pig bitter taste receptors, rTAS2Rs rat bitter taste receptors, RT-PCR reverse transcription-polymerase chain reaction, qRT-PCR quantitative reverse transcription-polymerase chain reaction, WB Western blotting

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