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RNA expression of TRPA1 was undetectable in the mouse carotid body. RNAs are subjected to RT-PCR from the mouse carotid body and that from dorsal root ganglia (DRG) as a positive control of TRPA1 expression. Identification of carotid body is confirmed by the detection of tyrosine hydroxylase (TH) RNA, a specific marker for carotid body in the carotid artery region. A similar result was obtained in two mice.
