PR:Q9TV66-1 potassium/sodium hyperpolarization-activated cyclic nucleotide-gated channel 4 isoform r1 (rabbit) rabbit-HCN4/iso:r1 located_in GO:0005886 plasma membrane PMID:15123648 IDA NCBITaxon:9986 UniProtKB:Q9TV66-1 20080601 PRO:CNA