Ready-to-use ELISA kits are available for the detection of hyperpolarization-activated, cyclic nucleotide-gated K+ 2, an alias of the protein, hyperpolarization activated cyclic nucleotide gated potassium and sodium channel 2. The official gene symbol is HCN2. The protein, with a mass of 97 kDa and length of 889 residues, is reported to be membrane-associated. It is a member of the Potassium channel HCN family and may be known by other names, including: HAC-1, BCNG-2, hyperpolarization activated cyclic nucleotide gated potassium channel 2, brain cyclic nucleotide-gated channel 2.