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HCNs are present in the OE during the early development of the olfactory system. A, RT-PCR from mouse OE for HCN1, 2, and 4. Numbers to the right are nucleotide length. Ad, Adult. B, Western blots from mouse OE. Numbers to the left are molecular weights. C, Quantification of protein levels across embryonic development for each HCN subunit. Asterisk indicates p < 0.05. Error bars, SEM.
