The ELISA kits listed below target HCN4, the symbol for the human gene, hyperpolarization activated cyclic nucleotide gated potassium channel 4, and a member of the Potassium channel HCN family. The protein encoded by HCN4 has a predicted amino acid length of 1203, a mass of 129 kDa, and a membrane subcellular localization. Glycosylation has been reported. Pathologic involvement is reported in Sick sinus syndrome 2. HCN4 may also be known by the following names: SSS2, hyperpolarization activated cyclic nucleotide-gated cation channel 4, and potassium/sodium hyperpolarization-activated cyclic nucleotide-gated channel 4. Orthologs of the gene, including human, mouse, rat, chicken, guinea pig, fish, and other mammalian are available targets of several ELISA kits.