Ready-to-use ELISA kits are available for the detection of h-eag, an alias of the protein, potassium voltage-gated channel subfamily H member 1. The official gene symbol is KCNH1. The protein, with a mass of 111.4 kDa and length of 989 residues, is reported to be nuclear and membrane-associated. It is a member of the Potassium channel family, H (Eag) (TC 1.A.1.20) subfamily, Kv10.1/KCNH1 sub-subfamily and may be known by other names, including: EAG, voltage-gated potassium channel subunit Kv10.1, potassium channel voltage gated eag related subfamily H member 1, ether-a-go-go Drosophila homolog of, ether-a-go-go potassium channel 1, and EAG channel 1, and TMBTS.